Finite Math Examples

,
Subtract from both sides of the equation.
Replace all occurrences of with the solution found by solving the last equation for . In this case, the value substituted is .
Solve for in the second equation.
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Subtract from .
Move all terms not containing to the right side of the equation.
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Subtract from both sides of the equation.
Add and .
Divide each term by and simplify.
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Divide each term in by .
Simplify the left side of the by cancelling the common factors.
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Reduce the expression by cancelling the common factors.
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Factor out of .
Move the negative one from the denominator of .
Simplify the expression.
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Multiply by .
Rewrite as .
Divide by .
Replace all occurrences of with the solution found by solving the last equation for . In this case, the value substituted is .
Simplify the right side.
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Multiply by .
Add and .
The solution can be shown in both point and equation forms.
Point Form:
Equation Form:
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