Thread: [SOLVED] Help solving an equation

I haven't done any algebra in years and I need to solve the following equation for x. Can anyone help me, or at least tell me how to go about it.

237.7y + xy - 7.5x = 0

Are you supposed to solve for "x=" in terms of y? Because you cannot solve this for a numerical value of x....

Yes, that is what I need.

Originally Posted by fantomx11

I haven't done any algebra in years and I need to solve the following equation for x. Can anyone help me, or at least tell me how to go about it.

237.7y + xy - 7.5x = 0

Hi there, if solving x in terms of y you need to isolate the terms that contain x on one side & factor the x out.

Here's one similar to your equation that I prepared earlier, model the steps from here and your's should be a piece of cake (hopefully chocolate cake)




leaving the x terms on the LHS



Factor out the x



divide the other factor over to the RHS and bingo!

Oh, man I feel silly now. Factoring was the first thing I learned in algebra. Funny that I would forget that when the full formula was much more complex and I didn't really have a problem with that. Thanks for the refresh.

well. I feel obligated to put the final solution, now that you understand the problem :P

ok.







well. there you go. Hope i didn't make a mistake

Shouldn't the solution be: ? Or did I get it wrong again.

Originally Posted by fantomx11

Shouldn't the solution be: ? Or did I get it wrong again.

Yes it is

Originally Posted by rtblue

The negative sign was not carried through.

yes, i'm sorry. i edited my post. I actually carried the negative on the first step, but i guess i forgot to write it on the following steps. Sorry.