-3(n-4)-(-7n-4)=72

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Solution for -3(n-4)-(-7n-4)=72 equation:


Simplifying
-3(n + -4) + -1(-7n + -4) = 72

Reorder the terms:
-3(-4 + n) + -1(-7n + -4) = 72
(-4 * -3 + n * -3) + -1(-7n + -4) = 72
(12 + -3n) + -1(-7n + -4) = 72

Reorder the terms:
12 + -3n + -1(-4 + -7n) = 72
12 + -3n + (-4 * -1 + -7n * -1) = 72
12 + -3n + (4 + 7n) = 72

Reorder the terms:
12 + 4 + -3n + 7n = 72

Combine like terms: 12 + 4 = 16
16 + -3n + 7n = 72

Combine like terms: -3n + 7n = 4n
16 + 4n = 72

Solving
16 + 4n = 72

Solving for variable 'n'.

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

Add '-16' to each side of the equation.
16 + -16 + 4n = 72 + -16

Combine like terms: 16 + -16 = 0
0 + 4n = 72 + -16
4n = 72 + -16

Combine like terms: 72 + -16 = 56
4n = 56

Divide each side by '4'.
n = 14

Simplifying
n = 14

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