-7(-1+3n)=-140

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Solution for -7(-1+3n)=-140 equation: 


Simplifying
-7(-1 + 3n) = -140
(-1 * -7 + 3n * -7) = -140
(7 + -21n) = -140

Solving
7 + -21n = -140

Solving for variable 'n'.

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

Add '-7' to each side of the equation.
7 + -7 + -21n = -140 + -7

Combine like terms: 7 + -7 = 0
0 + -21n = -140 + -7
-21n = -140 + -7

Combine like terms: -140 + -7 = -147
-21n = -147

Divide each side by '-21'.
n = 7

Simplifying
n = 7

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