(n-9)*7=42

Solution for (n-9)*7=42 equation:

Simplifying
(n + -9) * 7 = 42

Reorder the terms:
(-9 + n) * 7 = 42

Reorder the terms for easier multiplication:
7(-9 + n) = 42
(-9 * 7 + n * 7) = 42
(-63 + 7n) = 42

Solving
-63 + 7n = 42

Solving for variable 'n'.

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

Add '63' to each side of the equation.
-63 + 63 + 7n = 42 + 63

Combine like terms: -63 + 63 = 0
0 + 7n = 42 + 63
7n = 42 + 63

Combine like terms: 42 + 63 = 105
7n = 105

Divide each side by '7'.
n = 15

Simplifying
n = 15