Question 237263: What are the basic algebra equation rules for multiplication and division? I have the folllowing equation: CPI=EV/AC is the earned value equation, with the following information provided: .92= 172,500/AC
How do you isolate AC, when it is the denominator and get the other numbers on the other side for the answer?
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! .92= 172,500/AC
multiply both sides of the equation by AC to get:
.92*AC = 172,500
divide both sides of the equation by .92 to get:
AC = 172,500 / .92
solve for AC to get:
AC = 187,500
you move things around by adding or subtracting or multiplying or dividing both sides of the equation.
the equality remains the same.
if a = b, then a+7 = b+7
if a = b, then a-7 = b-7
if a = b, then a/7 = b/7
if a = b, then a*7 = b*7
if a = b, then log(a) = log(b)
if a = b, then a^7 = b^7
as long as a = b, you can always substitute a for b to get:
a = a
In your equation, you had .92 = 172500/AC
To move AC out of the denominator, all you had to do was multiply both sides of the equation by AC to get:
AC * .92 = (AC * 172500)/AC
The AC on the right side of the equation cancels out to get:
AC * .92 = 172500
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