l+(l-4)=72

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Solution for l+(l-4)=72 equation:


Simplifying
l + (l + -4) = 72

Reorder the terms:
l + (-4 + l) = 72

Remove parenthesis around (-4 + l)
l + -4 + l = 72

Reorder the terms:
-4 + l + l = 72

Combine like terms: l + l = 2l
-4 + 2l = 72

Solving
-4 + 2l = 72

Solving for variable 'l'.

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

Add '4' to each side of the equation.
-4 + 4 + 2l = 72 + 4

Combine like terms: -4 + 4 = 0
0 + 2l = 72 + 4
2l = 72 + 4

Combine like terms: 72 + 4 = 76
2l = 76

Divide each side by '2'.
l = 38

Simplifying
l = 38

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