3n+9=2n+7

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Solution for 3n+9=2n+7 equation:


Simplifying
3n + 9 = 2n + 7

Reorder the terms:
9 + 3n = 2n + 7

Reorder the terms:
9 + 3n = 7 + 2n

Solving
9 + 3n = 7 + 2n

Solving for variable 'n'.

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

Add '-2n' to each side of the equation.
9 + 3n + -2n = 7 + 2n + -2n

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

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

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

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

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

Divide each side by '1'.
n = -2

Simplifying
n = -2

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