7n-21+3n+15=10

Solution for 7n-21+3n+15=10 equation:

Simplifying
7n + -21 + 3n + 15 = 10

Reorder the terms:
-21 + 15 + 7n + 3n = 10

Combine like terms: -21 + 15 = -6
-6 + 7n + 3n = 10

Combine like terms: 7n + 3n = 10n
-6 + 10n = 10

Solving
-6 + 10n = 10

Solving for variable 'n'.

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

Add '6' to each side of the equation.
-6 + 6 + 10n = 10 + 6

Combine like terms: -6 + 6 = 0
0 + 10n = 10 + 6
10n = 10 + 6

Combine like terms: 10 + 6 = 16
10n = 16

Divide each side by '10'.
n = 1.6

Simplifying
n = 1.6