120x+20=100x+30x-20

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Solution for 120x+20=100x+30x-20 equation: 



120x+20=100x+30x-20

We move all terms to the left:

120x+20-(100x+30x-20)=0

We add all the numbers together, and all the variables

120x-(130x-20)+20=0

We get rid of parentheses

120x-130x+20+20=0

We add all the numbers together, and all the variables

-10x+40=0

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

-10x=-40

x=-40/-10

x=+4

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