l+w=80

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Solution for l+w=80 equation: 


Simplifying
l + w = 80

Solving
l + w = 80

Solving for variable 'l'.

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

Add '-1w' to each side of the equation.
l + w + -1w = 80 + -1w

Combine like terms: w + -1w = 0
l + 0 = 80 + -1w
l = 80 + -1w

Simplifying
l = 80 + -1w

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