7n-12-3n+8=20

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Solution for 7n-12-3n+8=20 equation:


Simplifying
7n + -12 + -3n + 8 = 20

Reorder the terms:
-12 + 8 + 7n + -3n = 20

Combine like terms: -12 + 8 = -4
-4 + 7n + -3n = 20

Combine like terms: 7n + -3n = 4n
-4 + 4n = 20

Solving
-4 + 4n = 20

Solving for variable 'n'.

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

Add '4' to each side of the equation.
-4 + 4 + 4n = 20 + 4

Combine like terms: -4 + 4 = 0
0 + 4n = 20 + 4
4n = 20 + 4

Combine like terms: 20 + 4 = 24
4n = 24

Divide each side by '4'.
n = 6

Simplifying
n = 6

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