2L+2W-42=0

Solution for 2L+2W-42=0 equation:

Simplifying
2L + 2W + -42 = 0

Reorder the terms:
-42 + 2L + 2W = 0

Solving
-42 + 2L + 2W = 0

Solving for variable 'L'.

Move all terms containing L to the left, all other terms to the right.

Add '42' to each side of the equation.
-42 + 2L + 42 + 2W = 0 + 42

Reorder the terms:
-42 + 42 + 2L + 2W = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 2L + 2W = 0 + 42
2L + 2W = 0 + 42

Combine like terms: 0 + 42 = 42
2L + 2W = 42

Add '-2W' to each side of the equation.
2L + 2W + -2W = 42 + -2W

Combine like terms: 2W + -2W = 0
2L + 0 = 42 + -2W
2L = 42 + -2W

Divide each side by '2'.
L = 21 + -1W

Simplifying
L = 21 + -1W