3x-4x=y

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Solution for 3x-4x=y equation: 


Simplifying
3x + -4x = y

Combine like terms: 3x + -4x = -1x
-1x = y

Solving
-1x = y

Solving for variable 'x'.

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

Divide each side by '-1'.
x = -1y

Simplifying
x = -1y

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