12n-90=7(n+70)

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Solution for 12n-90=7(n+70) equation:


Simplifying
12n + -90 = 7(n + 70)

Reorder the terms:
-90 + 12n = 7(n + 70)

Reorder the terms:
-90 + 12n = 7(70 + n)
-90 + 12n = (70 * 7 + n * 7)
-90 + 12n = (490 + 7n)

Solving
-90 + 12n = 490 + 7n

Solving for variable 'n'.

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

Add '-7n' to each side of the equation.
-90 + 12n + -7n = 490 + 7n + -7n

Combine like terms: 12n + -7n = 5n
-90 + 5n = 490 + 7n + -7n

Combine like terms: 7n + -7n = 0
-90 + 5n = 490 + 0
-90 + 5n = 490

Add '90' to each side of the equation.
-90 + 90 + 5n = 490 + 90

Combine like terms: -90 + 90 = 0
0 + 5n = 490 + 90
5n = 490 + 90

Combine like terms: 490 + 90 = 580
5n = 580

Divide each side by '5'.
n = 116

Simplifying
n = 116

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