Answer: L = A-E
Explanation:
I'm not sure why you put in the parenthesis, unless something is missing.
Anyways, we have some variable L and we're adding on another variable E.
To isolate L, we undo that addition. This means we subtract E from both sides
A = L+E
A-E = L+E-E ... subtracting E from both sides
A-E = L
L = A-E
