Algebra Examples

Solve the System of Equations x^2+y^2=100 y=-1/7x+50/7
Step 1
Combine and .
Step 2
Replace all occurrences of with in each equation.
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Step 2.1
Replace all occurrences of in with .
Step 2.2
Simplify the left side.
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Step 2.2.1
Simplify .
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Step 2.2.1.1
Simplify each term.
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Step 2.2.1.1.1
Rewrite as .
Step 2.2.1.1.2
Expand using the FOIL Method.
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Step 2.2.1.1.2.1
Apply the distributive property.
Step 2.2.1.1.2.2
Apply the distributive property.
Step 2.2.1.1.2.3
Apply the distributive property.
Step 2.2.1.1.3
Simplify and combine like terms.
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Step 2.2.1.1.3.1
Simplify each term.
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Step 2.2.1.1.3.1.1
Multiply .
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Step 2.2.1.1.3.1.1.1
Multiply by .
Step 2.2.1.1.3.1.1.2
Multiply by .
Step 2.2.1.1.3.1.1.3
Multiply by .
Step 2.2.1.1.3.1.1.4
Raise to the power of .
Step 2.2.1.1.3.1.1.5
Raise to the power of .
Step 2.2.1.1.3.1.1.6
Use the power rule to combine exponents.
Step 2.2.1.1.3.1.1.7
Add and .
Step 2.2.1.1.3.1.1.8
Multiply by .
Step 2.2.1.1.3.1.2
Multiply .
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Step 2.2.1.1.3.1.2.1
Multiply by .
Step 2.2.1.1.3.1.2.2
Multiply by .
Step 2.2.1.1.3.1.3
Multiply .
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Step 2.2.1.1.3.1.3.1
Multiply by .
Step 2.2.1.1.3.1.3.2
Multiply by .
Step 2.2.1.1.3.1.4
Multiply .
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Step 2.2.1.1.3.1.4.1
Multiply by .
Step 2.2.1.1.3.1.4.2
Multiply by .
Step 2.2.1.1.3.1.4.3
Multiply by .
Step 2.2.1.1.3.2
Subtract from .
Step 2.2.1.1.4
Simplify each term.
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Step 2.2.1.1.4.1
Multiply .
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Step 2.2.1.1.4.1.1
Combine and .
Step 2.2.1.1.4.1.2
Multiply by .
Step 2.2.1.1.4.2
Move the negative in front of the fraction.
Step 2.2.1.2
To write as a fraction with a common denominator, multiply by .
Step 2.2.1.3
Simplify terms.
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Step 2.2.1.3.1
Combine and .
Step 2.2.1.3.2
Combine the numerators over the common denominator.
Step 2.2.1.3.3
Combine the numerators over the common denominator.
Step 2.2.1.4
Move to the left of .
Step 2.2.1.5
Simplify terms.
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Step 2.2.1.5.1
Add and .
Step 2.2.1.5.2
Factor out of .
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Step 2.2.1.5.2.1
Factor out of .
Step 2.2.1.5.2.2
Factor out of .
Step 2.2.1.5.2.3
Factor out of .
Step 2.2.1.5.2.4
Factor out of .
Step 2.2.1.5.2.5
Factor out of .
Step 3
Solve for in .
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Step 3.1
Multiply both sides by .
Step 3.2
Simplify.
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Step 3.2.1
Simplify the left side.
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Step 3.2.1.1
Simplify .
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Step 3.2.1.1.1
Cancel the common factor of .
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Step 3.2.1.1.1.1
Cancel the common factor.
Step 3.2.1.1.1.2
Rewrite the expression.
Step 3.2.1.1.2
Apply the distributive property.
Step 3.2.1.1.3
Simplify.
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Step 3.2.1.1.3.1
Multiply by .
Step 3.2.1.1.3.2
Multiply by .
Step 3.2.2
Simplify the right side.
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Step 3.2.2.1
Multiply by .
Step 3.3
Solve for .
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Step 3.3.1
Subtract from both sides of the equation.
Step 3.3.2
Subtract from .
Step 3.3.3
Factor the left side of the equation.
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Step 3.3.3.1
Factor out of .
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Step 3.3.3.1.1
Factor out of .
Step 3.3.3.1.2
Factor out of .
Step 3.3.3.1.3
Factor out of .
Step 3.3.3.1.4
Factor out of .
Step 3.3.3.1.5
Factor out of .
Step 3.3.3.2
Factor.
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Step 3.3.3.2.1
Factor using the AC method.
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Step 3.3.3.2.1.1
Consider the form . Find a pair of integers whose product is and whose sum is . In this case, whose product is and whose sum is .
Step 3.3.3.2.1.2
Write the factored form using these integers.
Step 3.3.3.2.2
Remove unnecessary parentheses.
Step 3.3.4
If any individual factor on the left side of the equation is equal to , the entire expression will be equal to .
Step 3.3.5
Set equal to and solve for .
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Step 3.3.5.1
Set equal to .
Step 3.3.5.2
Add to both sides of the equation.
Step 3.3.6
Set equal to and solve for .
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Step 3.3.6.1
Set equal to .
Step 3.3.6.2
Subtract from both sides of the equation.
Step 3.3.7
The final solution is all the values that make true.
Step 4
Replace all occurrences of with in each equation.
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Step 4.1
Replace all occurrences of in with .
Step 4.2
Simplify the right side.
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Step 4.2.1
Simplify .
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Step 4.2.1.1
Combine the numerators over the common denominator.
Step 4.2.1.2
Simplify the expression.
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Step 4.2.1.2.1
Add and .
Step 4.2.1.2.2
Divide by .
Step 5
Replace all occurrences of with in each equation.
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Step 5.1
Replace all occurrences of in with .
Step 5.2
Simplify the right side.
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Step 5.2.1
Simplify .
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Step 5.2.1.1
Combine the numerators over the common denominator.
Step 5.2.1.2
Simplify the expression.
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Step 5.2.1.2.1
Add and .
Step 5.2.1.2.2
Divide by .
Step 6
The solution to the system is the complete set of ordered pairs that are valid solutions.
Step 7
The result can be shown in multiple forms.
Point Form:
Equation Form:
Step 8