3(7n-3)=138

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Solution for 3(7n-3)=138 equation:


Simplifying
3(7n + -3) = 138

Reorder the terms:
3(-3 + 7n) = 138
(-3 * 3 + 7n * 3) = 138
(-9 + 21n) = 138

Solving
-9 + 21n = 138

Solving for variable 'n'.

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

Add '9' to each side of the equation.
-9 + 9 + 21n = 138 + 9

Combine like terms: -9 + 9 = 0
0 + 21n = 138 + 9
21n = 138 + 9

Combine like terms: 138 + 9 = 147
21n = 147

Divide each side by '21'.
n = 7

Simplifying
n = 7

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