-2(6+7n)-7(1-n)=-40

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Solution for -2(6+7n)-7(1-n)=-40 equation: 


Simplifying
-2(6 + 7n) + -7(1 + -1n) = -40
(6 * -2 + 7n * -2) + -7(1 + -1n) = -40
(-12 + -14n) + -7(1 + -1n) = -40
-12 + -14n + (1 * -7 + -1n * -7) = -40
-12 + -14n + (-7 + 7n) = -40

Reorder the terms:
-12 + -7 + -14n + 7n = -40

Combine like terms: -12 + -7 = -19
-19 + -14n + 7n = -40

Combine like terms: -14n + 7n = -7n
-19 + -7n = -40

Solving
-19 + -7n = -40

Solving for variable 'n'.

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

Add '19' to each side of the equation.
-19 + 19 + -7n = -40 + 19

Combine like terms: -19 + 19 = 0
0 + -7n = -40 + 19
-7n = -40 + 19

Combine like terms: -40 + 19 = -21
-7n = -21

Divide each side by '-7'.
n = 3

Simplifying
n = 3

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