2(n-4)=21

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Solution for 2(n-4)=21 equation: 


Simplifying
2(n + -4) = 21

Reorder the terms:
2(-4 + n) = 21
(-4 * 2 + n * 2) = 21
(-8 + 2n) = 21

Solving
-8 + 2n = 21

Solving for variable 'n'.

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

Add '8' to each side of the equation.
-8 + 8 + 2n = 21 + 8

Combine like terms: -8 + 8 = 0
0 + 2n = 21 + 8
2n = 21 + 8

Combine like terms: 21 + 8 = 29
2n = 29

Divide each side by '2'.
n = 14.5

Simplifying
n = 14.5

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