How would I rewrite and solve the equation P=2l+2w for w?

Answer 1

Solving for "w" means you want the equation to say "w = 'something' "

P = 2l + 2w

You want to get the "w" by itself. So the first step is to get rid of the "2l" by subtracting it from both sides of the equation:

P = 2l + 2w

-2l -2l

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P - 2l = 2w

Now you are close, but you want just plain "w" not "2w". Notice that the 2 and the "w" are being multiplied. To get rid of the 2, do the opposite, so divided both sides by 2:

P - 2l = 2w

--------- -----

2 2

That gives you:

Answer 2

P=2l+2w

p-2l =2w : subtract 2l from both sides

(p-2l)/2 = w : divide both sides by 2