120+x+x=600

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Solution for 120+x+x=600 equation: 


Simplifying
120 + x + x = 600

Combine like terms: x + x = 2x
120 + 2x = 600

Solving
120 + 2x = 600

Solving for variable 'x'.

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

Add '-120' to each side of the equation.
120 + -120 + 2x = 600 + -120

Combine like terms: 120 + -120 = 0
0 + 2x = 600 + -120
2x = 600 + -120

Combine like terms: 600 + -120 = 480
2x = 480

Divide each side by '2'.
x = 240

Simplifying
x = 240

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