90=2L+2(L-7)

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Solution for 90=2L+2(L-7) equation: 


Simplifying
90 = 2L + 2(L + -7)

Reorder the terms:
90 = 2L + 2(-7 + L)
90 = 2L + (-7 * 2 + L * 2)
90 = 2L + (-14 + 2L)

Reorder the terms:
90 = -14 + 2L + 2L

Combine like terms: 2L + 2L = 4L
90 = -14 + 4L

Solving
90 = -14 + 4L

Solving for variable 'L'.

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

Add '-4L' to each side of the equation.
90 + -4L = -14 + 4L + -4L

Combine like terms: 4L + -4L = 0
90 + -4L = -14 + 0
90 + -4L = -14

Add '-90' to each side of the equation.
90 + -90 + -4L = -14 + -90

Combine like terms: 90 + -90 = 0
0 + -4L = -14 + -90
-4L = -14 + -90

Combine like terms: -14 + -90 = -104
-4L = -104

Divide each side by '-4'.
L = 26

Simplifying
L = 26

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