7(2l+1)=21

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Solution for 7(2l+1)=21 equation: 


Simplifying
7(2l + 1) = 21

Reorder the terms:
7(1 + 2l) = 21
(1 * 7 + 2l * 7) = 21
(7 + 14l) = 21

Solving
7 + 14l = 21

Solving for variable 'l'.

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

Add '-7' to each side of the equation.
7 + -7 + 14l = 21 + -7

Combine like terms: 7 + -7 = 0
0 + 14l = 21 + -7
14l = 21 + -7

Combine like terms: 21 + -7 = 14
14l = 14

Divide each side by '14'.
l = 1

Simplifying
l = 1

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