10x+90=9x-30

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Solution for 10x+90=9x-30 equation: 



10x+90=9x-30

We move all terms to the left:

10x+90-(9x-30)=0

We get rid of parentheses

10x-9x+30+90=0

We add all the numbers together, and all the variables

x+120=0

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

x=-120

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