3n+7=n+9

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


Simplifying
3n + 7 = n + 9

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

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

Solving
7 + 3n = 9 + n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
7 + 3n + -1n = 9 + n + -1n

Combine like terms: 3n + -1n = 2n
7 + 2n = 9 + n + -1n

Combine like terms: n + -1n = 0
7 + 2n = 9 + 0
7 + 2n = 9

Add '-7' to each side of the equation.
7 + -7 + 2n = 9 + -7

Combine like terms: 7 + -7 = 0
0 + 2n = 9 + -7
2n = 9 + -7

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

Divide each side by '2'.
n = 1

Simplifying
n = 1

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