Finite Math Examples

Solve by Substitution a=1/2b+3 , a-4b=-11
,
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
To write as a fraction with a common denominator, multiply by .
Step 2.2.1.2
Simplify terms.
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Step 2.2.1.2.1
Combine and .
Step 2.2.1.2.2
Combine the numerators over the common denominator.
Step 2.2.1.3
Simplify each term.
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Step 2.2.1.3.1
Simplify the numerator.
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Step 2.2.1.3.1.1
Factor out of .
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Step 2.2.1.3.1.1.1
Raise to the power of .
Step 2.2.1.3.1.1.2
Factor out of .
Step 2.2.1.3.1.1.3
Factor out of .
Step 2.2.1.3.1.1.4
Factor out of .
Step 2.2.1.3.1.2
Multiply by .
Step 2.2.1.3.1.3
Subtract from .
Step 2.2.1.3.2
Move to the left of .
Step 2.2.1.3.3
Move the negative in front of the fraction.
Step 3
Solve for in .
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Step 3.1
Move all terms not containing to the right side of the equation.
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Step 3.1.1
Subtract from both sides of the equation.
Step 3.1.2
Subtract from .
Step 3.2
Multiply both sides of the equation by .
Step 3.3
Simplify both sides of the equation.
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Step 3.3.1
Simplify the left side.
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Step 3.3.1.1
Simplify .
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Step 3.3.1.1.1
Cancel the common factor of .
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Step 3.3.1.1.1.1
Move the leading negative in into the numerator.
Step 3.3.1.1.1.2
Move the leading negative in into the numerator.
Step 3.3.1.1.1.3
Factor out of .
Step 3.3.1.1.1.4
Cancel the common factor.
Step 3.3.1.1.1.5
Rewrite the expression.
Step 3.3.1.1.2
Cancel the common factor of .
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Step 3.3.1.1.2.1
Factor out of .
Step 3.3.1.1.2.2
Cancel the common factor.
Step 3.3.1.1.2.3
Rewrite the expression.
Step 3.3.1.1.3
Multiply.
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Step 3.3.1.1.3.1
Multiply by .
Step 3.3.1.1.3.2
Multiply by .
Step 3.3.2
Simplify the right side.
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Step 3.3.2.1
Simplify .
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Step 3.3.2.1.1
Cancel the common factor of .
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Step 3.3.2.1.1.1
Move the leading negative in into the numerator.
Step 3.3.2.1.1.2
Factor out of .
Step 3.3.2.1.1.3
Cancel the common factor.
Step 3.3.2.1.1.4
Rewrite the expression.
Step 3.3.2.1.2
Multiply by .
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
Divide by .
Step 4.2.1.2
Add and .
Step 5
List all of the solutions.