3x+-x=42

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Solution for 3x+-x=42 equation: 


Simplifying
3x + -1x = 42

Combine like terms: 3x + -1x = 2x
2x = 42

Solving
2x = 42

Solving for variable 'x'.

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

Divide each side by '2'.
x = 21

Simplifying
x = 21

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