-7n+3(7n-1)=81

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Solution for -7n+3(7n-1)=81 equation:


Simplifying
-7n + 3(7n + -1) = 81

Reorder the terms:
-7n + 3(-1 + 7n) = 81
-7n + (-1 * 3 + 7n * 3) = 81
-7n + (-3 + 21n) = 81

Reorder the terms:
-3 + -7n + 21n = 81

Combine like terms: -7n + 21n = 14n
-3 + 14n = 81

Solving
-3 + 14n = 81

Solving for variable 'n'.

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

Add '3' to each side of the equation.
-3 + 3 + 14n = 81 + 3

Combine like terms: -3 + 3 = 0
0 + 14n = 81 + 3
14n = 81 + 3

Combine like terms: 81 + 3 = 84
14n = 84

Divide each side by '14'.
n = 6

Simplifying
n = 6

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