121=-5-3(5n-7)

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Solution for 121=-5-3(5n-7) equation:


Simplifying
121 = -5 + -3(5n + -7)

Reorder the terms:
121 = -5 + -3(-7 + 5n)
121 = -5 + (-7 * -3 + 5n * -3)
121 = -5 + (21 + -15n)

Combine like terms: -5 + 21 = 16
121 = 16 + -15n

Solving
121 = 16 + -15n

Solving for variable 'n'.

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

Add '15n' to each side of the equation.
121 + 15n = 16 + -15n + 15n

Combine like terms: -15n + 15n = 0
121 + 15n = 16 + 0
121 + 15n = 16

Add '-121' to each side of the equation.
121 + -121 + 15n = 16 + -121

Combine like terms: 121 + -121 = 0
0 + 15n = 16 + -121
15n = 16 + -121

Combine like terms: 16 + -121 = -105
15n = -105

Divide each side by '15'.
n = -7

Simplifying
n = -7

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