Precalculus Examples

Solve for x x+5=15/x
Step 1
Subtract from both sides of the equation.
Step 2
Find the LCD of the terms in the equation.
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Step 2.1
Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.
Step 2.2
The LCM of one and any expression is the expression.
Step 3
Multiply each term in by to eliminate the fractions.
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Step 3.1
Multiply each term in by .
Step 3.2
Simplify the left side.
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Step 3.2.1
Multiply by .
Step 3.3
Simplify the right side.
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Step 3.3.1
Cancel the common factor of .
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Step 3.3.1.1
Cancel the common factor.
Step 3.3.1.2
Rewrite the expression.
Step 4
Solve the equation.
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Step 4.1
Add to both sides of the equation.
Step 4.2
Subtract from both sides of the equation.
Step 4.3
Use the quadratic formula to find the solutions.
Step 4.4
Substitute the values , , and into the quadratic formula and solve for .
Step 4.5
Simplify.
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Step 4.5.1
Simplify the numerator.
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Step 4.5.1.1
Raise to the power of .
Step 4.5.1.2
Multiply .
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Step 4.5.1.2.1
Multiply by .
Step 4.5.1.2.2
Multiply by .
Step 4.5.1.3
Add and .
Step 4.5.2
Multiply by .
Step 4.6
The final answer is the combination of both solutions.
Step 5
The result can be shown in multiple forms.
Exact Form:
Decimal Form: