SOLUTION: Solve for x: A=2*pi*r*x+pi*r^2 I was assigned this homework problem as extra credit but I don't know how one would go about solving for x. If you could help me that would be great

Algebra ->  Expressions-with-variables -> SOLUTION: Solve for x: A=2*pi*r*x+pi*r^2 I was assigned this homework problem as extra credit but I don't know how one would go about solving for x. If you could help me that would be great      Log On


   

Question 775957: Solve for x: A=2*pi*r*x+pi*r^2
I was assigned this homework problem as extra credit but I don't know how one would go about solving for x. If you could help me that would be great and greatly appreciated. thanks :)
Answer by tanjo3(60) About Me  (Show Source):
You can put this solution on YOUR website!
Perhaps it's easier than I think but:
A+=+2%28pi%29rx+%2B+%28pi%29r%5E2
A+-+%28pi%29r%5E2+=+2%28pi%29rx

I'm going to rearrange it here so that x is on the left (personal preference).
2%28pi%29rx+=+A+-+%28pi%29r%5E2
x+=+A%2F%282%28pi%29r%29+-+%28pi%29r%5E2%2F%282%28pi%29r%29
x+=+A%2F%282%28pi%29r%29+-+r%2F2