-20x+15x=55

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Solution for -20x+15x=55 equation: 


Simplifying
-20x + 15x = 55

Combine like terms: -20x + 15x = -5x
-5x = 55

Solving
-5x = 55

Solving for variable 'x'.

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

Divide each side by '-5'.
x = -11

Simplifying
x = -11

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