x+(x+3)+7x=120

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Solution for x+(x+3)+7x=120 equation: 



x+(x+3)+7x=120

We move all terms to the left:

x+(x+3)+7x-(120)=0

We add all the numbers together, and all the variables

8x+(x+3)-120=0

We get rid of parentheses

8x+x+3-120=0

We add all the numbers together, and all the variables

9x-117=0

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

9x=117

x=117/9

x=13

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