7n-9=5(n+3)

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Solution for 7n-9=5(n+3) equation:


Simplifying
7n + -9 = 5(n + 3)

Reorder the terms:
-9 + 7n = 5(n + 3)

Reorder the terms:
-9 + 7n = 5(3 + n)
-9 + 7n = (3 * 5 + n * 5)
-9 + 7n = (15 + 5n)

Solving
-9 + 7n = 15 + 5n

Solving for variable 'n'.

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

Add '-5n' to each side of the equation.
-9 + 7n + -5n = 15 + 5n + -5n

Combine like terms: 7n + -5n = 2n
-9 + 2n = 15 + 5n + -5n

Combine like terms: 5n + -5n = 0
-9 + 2n = 15 + 0
-9 + 2n = 15

Add '9' to each side of the equation.
-9 + 9 + 2n = 15 + 9

Combine like terms: -9 + 9 = 0
0 + 2n = 15 + 9
2n = 15 + 9

Combine like terms: 15 + 9 = 24
2n = 24

Divide each side by '2'.
n = 12

Simplifying
n = 12

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