3x-8x-12=18

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Solution for 3x-8x-12=18 equation: 


Simplifying
3x + -8x + -12 = 18

Reorder the terms:
-12 + 3x + -8x = 18

Combine like terms: 3x + -8x = -5x
-12 + -5x = 18

Solving
-12 + -5x = 18

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 + -5x = 18 + 12

Combine like terms: -12 + 12 = 0
0 + -5x = 18 + 12
-5x = 18 + 12

Combine like terms: 18 + 12 = 30
-5x = 30

Divide each side by '-5'.
x = -6

Simplifying
x = -6

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