x+7x-12=20

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Solution for x+7x-12=20 equation: 


Simplifying
x + 7x + -12 = 20

Reorder the terms:
-12 + x + 7x = 20

Combine like terms: x + 7x = 8x
-12 + 8x = 20

Solving
-12 + 8x = 20

Solving for variable 'x'.

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

Add '12' to each side of the equation.
-12 + 12 + 8x = 20 + 12

Combine like terms: -12 + 12 = 0
0 + 8x = 20 + 12
8x = 20 + 12

Combine like terms: 20 + 12 = 32
8x = 32

Divide each side by '8'.
x = 4

Simplifying
x = 4

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