2(L)+2(L-4)=72

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Solution for 2(L)+2(L-4)=72 equation: 


Simplifying
2(L) + 2(L + -4) = 72

Reorder the terms:
2L + 2(-4 + L) = 72
2L + (-4 * 2 + L * 2) = 72
2L + (-8 + 2L) = 72

Reorder the terms:
-8 + 2L + 2L = 72

Combine like terms: 2L + 2L = 4L
-8 + 4L = 72

Solving
-8 + 4L = 72

Solving for variable 'L'.

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

Add '8' to each side of the equation.
-8 + 8 + 4L = 72 + 8

Combine like terms: -8 + 8 = 0
0 + 4L = 72 + 8
4L = 72 + 8

Combine like terms: 72 + 8 = 80
4L = 80

Divide each side by '4'.
L = 20

Simplifying
L = 20

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