5=21-4l

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Solution for 5=21-4l equation:


Simplifying
5 = 21 + -4l

Solving
5 = 21 + -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.
5 + 4l = 21 + -4l + 4l

Combine like terms: -4l + 4l = 0
5 + 4l = 21 + 0
5 + 4l = 21

Add '-5' to each side of the equation.
5 + -5 + 4l = 21 + -5

Combine like terms: 5 + -5 = 0
0 + 4l = 21 + -5
4l = 21 + -5

Combine like terms: 21 + -5 = 16
4l = 16

Divide each side by '4'.
l = 4

Simplifying
l = 4

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