(l-4)(w*2)=420

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Solution for (l-4)(w*2)=420 equation: 


Simplifying
(l + -4)(w * 2) = 420

Reorder the terms:
(-4 + l)(w * 2) = 420

Reorder the terms for easier multiplication:
(-4 + l)(2w) = 420

Remove parenthesis around (2w)
(-4 + l) * 2w = 420

Reorder the terms for easier multiplication:
2w(-4 + l) = 420
(-4 * 2w + l * 2w) = 420

Reorder the terms:
(2lw + -8w) = 420
(2lw + -8w) = 420

Solving
2lw + -8w = 420

Solving for variable 'l'.

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

Add '8w' to each side of the equation.
2lw + -8w + 8w = 420 + 8w

Combine like terms: -8w + 8w = 0
2lw + 0 = 420 + 8w
2lw = 420 + 8w

Divide each side by '2w'.
l = 210w-1 + 4

Simplifying
l = 210w-1 + 4

Reorder the terms:
l = 4 + 210w-1

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