(n-15)*7=42

Solution for (n-15)*7=42 equation:

Simplifying
(n + -15) * 7 = 42

Reorder the terms:
(-15 + n) * 7 = 42

Reorder the terms for easier multiplication:
7(-15 + n) = 42
(-15 * 7 + n * 7) = 42
(-105 + 7n) = 42

Solving
-105 + 7n = 42

Solving for variable 'n'.

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

Add '105' to each side of the equation.
-105 + 105 + 7n = 42 + 105

Combine like terms: -105 + 105 = 0
0 + 7n = 42 + 105
7n = 42 + 105

Combine like terms: 42 + 105 = 147
7n = 147

Divide each side by '7'.
n = 21

Simplifying
n = 21