7n+2n-3=15

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Solution for 7n+2n-3=15 equation: 


Simplifying
7n + 2n + -3 = 15

Reorder the terms:
-3 + 7n + 2n = 15

Combine like terms: 7n + 2n = 9n
-3 + 9n = 15

Solving
-3 + 9n = 15

Solving for variable 'n'.

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

Add '3' to each side of the equation.
-3 + 3 + 9n = 15 + 3

Combine like terms: -3 + 3 = 0
0 + 9n = 15 + 3
9n = 15 + 3

Combine like terms: 15 + 3 = 18
9n = 18

Divide each side by '9'.
n = 2

Simplifying
n = 2

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