2x-x=120-30

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Solution for 2x-x=120-30 equation: 



2x-x=120-30

We move all terms to the left:

2x-x-(120-30)=0

We add all the numbers together, and all the variables

2x-x-90=0

We add all the numbers together, and all the variables

x-90=0

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

x=90

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