90=lw

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Solution for 90=lw equation:


Simplifying
90 = lw

Solving
90 = lw

Solving for variable 'l'.

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

Add '-1lw' to each side of the equation.
90 + -1lw = lw + -1lw

Combine like terms: lw + -1lw = 0
90 + -1lw = 0

Add '-90' to each side of the equation.
90 + -90 + -1lw = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -1lw = 0 + -90
-1lw = 0 + -90

Combine like terms: 0 + -90 = -90
-1lw = -90

Divide each side by '-1w'.
l = 90w-1

Simplifying
l = 90w-1

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