7n-1=9+10n-12

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Solution for 7n-1=9+10n-12 equation:


Simplifying
7n + -1 = 9 + 10n + -12

Reorder the terms:
-1 + 7n = 9 + 10n + -12

Reorder the terms:
-1 + 7n = 9 + -12 + 10n

Combine like terms: 9 + -12 = -3
-1 + 7n = -3 + 10n

Solving
-1 + 7n = -3 + 10n

Solving for variable 'n'.

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

Add '-10n' to each side of the equation.
-1 + 7n + -10n = -3 + 10n + -10n

Combine like terms: 7n + -10n = -3n
-1 + -3n = -3 + 10n + -10n

Combine like terms: 10n + -10n = 0
-1 + -3n = -3 + 0
-1 + -3n = -3

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

Combine like terms: -1 + 1 = 0
0 + -3n = -3 + 1
-3n = -3 + 1

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

Divide each side by '-3'.
n = 0.6666666667

Simplifying
n = 0.6666666667

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