3x-5x=7

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Solution for 3x-5x=7 equation: 


Simplifying
3x + -5x = 7

Combine like terms: 3x + -5x = -2x
-2x = 7

Solving
-2x = 7

Solving for variable 'x'.

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

Divide each side by '-2'.
x = -3.5

Simplifying
x = -3.5

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