-120=-3(5-7n)

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Solution for -120=-3(5-7n) equation:


Simplifying
-120 = -3(5 + -7n)
-120 = (5 * -3 + -7n * -3)
-120 = (-15 + 21n)

Solving
-120 = -15 + 21n

Solving for variable 'n'.

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

Add '-21n' to each side of the equation.
-120 + -21n = -15 + 21n + -21n

Combine like terms: 21n + -21n = 0
-120 + -21n = -15 + 0
-120 + -21n = -15

Add '120' to each side of the equation.
-120 + 120 + -21n = -15 + 120

Combine like terms: -120 + 120 = 0
0 + -21n = -15 + 120
-21n = -15 + 120

Combine like terms: -15 + 120 = 105
-21n = 105

Divide each side by '-21'.
n = -5

Simplifying
n = -5

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