Question 51025
2L + 2W = P Sovle for L
First let's isolate the 2L by subtracting 2W from both sides of the equation...
2L = P - 2W
Now, in order to solve for L we can simply divide both sides of the equation by 2.
{{{(2L)/2 = (P - 2W)/2}}}
the 2's cancel on the left side of the equation, but they cannot cancel on the right because of the subtraction. 
{{{L = (P - 2W)/2}}}
So this is as far as we can go, it cannot be simplified any further.
I hope this helps.
Good Luck!