x+2x=200-180-120

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Solution for x+2x=200-180-120 equation: 


Simplifying
x + 2x = 200 + -180 + -120

Combine like terms: x + 2x = 3x
3x = 200 + -180 + -120

Combine like terms: 200 + -180 = 20
3x = 20 + -120

Combine like terms: 20 + -120 = -100
3x = -100

Solving
3x = -100

Solving for variable 'x'.

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

Divide each side by '3'.
x = -33.33333333

Simplifying
x = -33.33333333

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