x-8x=42

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Solution for x-8x=42 equation: 


Simplifying
x + -8x = 42

Combine like terms: x + -8x = -7x
-7x = 42

Solving
-7x = 42

Solving for variable 'x'.

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

Divide each side by '-7'.
x = -6

Simplifying
x = -6

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