I was hoping to receive some help I'm trying to solve for the variable r.

136.89=65.33 * ((r + 4) * (r + 4) - (4 * 4)) / 12

Thanks in advanced.

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- Sep 1st 2010, 11:34 AMHenningfeldSolving for a variable
I was hoping to receive some help I'm trying to solve for the variable r.

136.89=65.33 * ((r + 4) * (r + 4) - (4 * 4)) / 12

Thanks in advanced. - Sep 1st 2010, 12:04 PMundefined
- Sep 1st 2010, 12:09 PMHenningfeld
I'm sorry it still has me confused. It has been a few years since I have had to touch an equation like this. I seem to what to start in the wrong directions by multiple by 12 to cancel and then divide by 65.33. In your equation I'm not sure where the 3x comes from. Any suggestions?

- Sep 1st 2010, 12:13 PMundefined
- Sep 1st 2010, 12:21 PMHenningfeld
When I expand that I get (r^2 + 8r + 16) (-16) those two will cancel leaving (r^2 +8r) is this correct?

- Sep 1st 2010, 12:24 PMundefined
- Sep 1st 2010, 12:29 PMHenningfeld
So in a whole equation I have this left 24.95515 = (r^2 + 8r). This is where I begin to second guess what should come next. Do I take the square root of r^2 on both sides then add r to 8r to make 9r then divide by 9?

- Sep 1st 2010, 12:36 PMundefined