l+l+k=20

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Solution for l+l+k=20 equation: 


Simplifying
l + l + k = 20

Reorder the terms:
k + l + l = 20

Combine like terms: l + l = 2l
k + 2l = 20

Solving
k + 2l = 20

Solving for variable 'k'.

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

Add '-2l' to each side of the equation.
k + 2l + -2l = 20 + -2l

Combine like terms: 2l + -2l = 0
k + 0 = 20 + -2l
k = 20 + -2l

Simplifying
k = 20 + -2l

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