L+(l+2)+(21-4)=18

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Solution for L+(l+2)+(21-4)=18 equation:


Simplifying
L + (l + 2) + (21 + -4) = 18

Reorder the terms:
L + (2 + l) + (21 + -4) = 18

Remove parenthesis around (2 + l)
L + 2 + l + (21 + -4) = 18

Combine like terms: 21 + -4 = 17
L + 2 + l + (17) = 18
L + 2 + l + 17 = 18

Reorder the terms:
2 + 17 + L + l = 18

Combine like terms: 2 + 17 = 19
19 + L + l = 18

Solving
19 + L + l = 18

Solving for variable 'L'.

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

Add '-19' to each side of the equation.
19 + L + -19 + l = 18 + -19

Reorder the terms:
19 + -19 + L + l = 18 + -19

Combine like terms: 19 + -19 = 0
0 + L + l = 18 + -19
L + l = 18 + -19

Combine like terms: 18 + -19 = -1
L + l = -1

Add '-1l' to each side of the equation.
L + l + -1l = -1 + -1l

Combine like terms: l + -1l = 0
L + 0 = -1 + -1l
L = -1 + -1l

Simplifying
L = -1 + -1l

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