5n+1+7n=9

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Solution for 5n+1+7n=9 equation:


Simplifying
5n + 1 + 7n = 9

Reorder the terms:
1 + 5n + 7n = 9

Combine like terms: 5n + 7n = 12n
1 + 12n = 9

Solving
1 + 12n = 9

Solving for variable 'n'.

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

Add '-1' to each side of the equation.
1 + -1 + 12n = 9 + -1

Combine like terms: 1 + -1 = 0
0 + 12n = 9 + -1
12n = 9 + -1

Combine like terms: 9 + -1 = 8
12n = 8

Divide each side by '12'.
n = 0.6666666667

Simplifying
n = 0.6666666667

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