View Full Version : Profit=Revenue-Cost

ngann

11-02-2008, 02:28 PM

p=r-c - asked to rewrite the formula to solve for c - Profit equals revenue minus cost

I am hitting a block on this one

Here is what I came up with p-r=c

I know this can't be right because c is negative in the original equation. Do I need to divide by -c to get it by itself?

Loren

11-02-2008, 03:25 PM

Add c to both sides of the equation. Then subtract p from both sides of the equation.

Here is what I came up with p-r=c <<< should have been p-r=-c. From here, just multiply both sides by -1.

ngann

11-02-2008, 03:58 PM

Thank you Loren, that does make better sense and I tested it with real numbers.

Subhotosh Khan

11-02-2008, 04:48 PM

p=r-c - asked to rewrite the formula to solve for c - Profit equals revenue minus cost

I am hitting a block on this one

Here is what I came up with

p - r = -c ............. This is perfectly OKay - but to make 'c' positive

Change sign of everybody

-p + r = c .............you could leave it right here or write it as

c = r - p

I know this can't be right because c is negative in the original equation. Do I need to divide by -c to get it by itself?

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