7n-9=3n+7

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Solution for 7n-9=3n+7 equation:


Simplifying
7n + -9 = 3n + 7

Reorder the terms:
-9 + 7n = 3n + 7

Reorder the terms:
-9 + 7n = 7 + 3n

Solving
-9 + 7n = 7 + 3n

Solving for variable 'n'.

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

Add '-3n' to each side of the equation.
-9 + 7n + -3n = 7 + 3n + -3n

Combine like terms: 7n + -3n = 4n
-9 + 4n = 7 + 3n + -3n

Combine like terms: 3n + -3n = 0
-9 + 4n = 7 + 0
-9 + 4n = 7

Add '9' to each side of the equation.
-9 + 9 + 4n = 7 + 9

Combine like terms: -9 + 9 = 0
0 + 4n = 7 + 9
4n = 7 + 9

Combine like terms: 7 + 9 = 16
4n = 16

Divide each side by '4'.
n = 4

Simplifying
n = 4

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