139=3(7n+2)-2n

Solution for 139=3(7n+2)-2n equation:

Simplifying
139 = 3(7n + 2) + -2n

Reorder the terms:
139 = 3(2 + 7n) + -2n
139 = (2 * 3 + 7n * 3) + -2n
139 = (6 + 21n) + -2n

Combine like terms: 21n + -2n = 19n
139 = 6 + 19n

Solving
139 = 6 + 19n

Solving for variable 'n'.

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

Add '-19n' to each side of the equation.
139 + -19n = 6 + 19n + -19n

Combine like terms: 19n + -19n = 0
139 + -19n = 6 + 0
139 + -19n = 6

Add '-139' to each side of the equation.
139 + -139 + -19n = 6 + -139

Combine like terms: 139 + -139 = 0
0 + -19n = 6 + -139
-19n = 6 + -139

Combine like terms: 6 + -139 = -133
-19n = -133

Divide each side by '-19'.
n = 7

Simplifying
n = 7