8x-3x=42-x

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Solution for 8x-3x=42-x equation: 


Simplifying
8x + -3x = 42 + -1x

Combine like terms: 8x + -3x = 5x
5x = 42 + -1x

Solving
5x = 42 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
5x + x = 42 + -1x + x

Combine like terms: 5x + x = 6x
6x = 42 + -1x + x

Combine like terms: -1x + x = 0
6x = 42 + 0
6x = 42

Divide each side by '6'.
x = 7

Simplifying
x = 7

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