3x+120+x+20=540

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Solution for 3x+120+x+20=540 equation: 



3x+120+x+20=540

We move all terms to the left:

3x+120+x+20-(540)=0

We add all the numbers together, and all the variables

4x-400=0

We move all terms containing x to the left, all other terms to the right

4x=400

x=400/4

x=100

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