9x+90+x-30=180

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Solution for 9x+90+x-30=180 equation: 



9x+90+x-30=180

We move all terms to the left:

9x+90+x-30-(180)=0

We add all the numbers together, and all the variables

10x-120=0

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

10x=120

x=120/10

x=12

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