20=13-l

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Solution for 20=13-l equation:


Simplifying
20 = 13 + -1l

Solving
20 = 13 + -1l

Solving for variable 'l'.

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

Add 'l' to each side of the equation.
20 + l = 13 + -1l + l

Combine like terms: -1l + l = 0
20 + l = 13 + 0
20 + l = 13

Add '-20' to each side of the equation.
20 + -20 + l = 13 + -20

Combine like terms: 20 + -20 = 0
0 + l = 13 + -20
l = 13 + -20

Combine like terms: 13 + -20 = -7
l = -7

Simplifying
l = -7

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