9x+90=3x-18

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Solution for 9x+90=3x-18 equation: 



9x+90=3x-18

We move all terms to the left:

9x+90-(3x-18)=0

We get rid of parentheses

9x-3x+18+90=0

We add all the numbers together, and all the variables

6x+108=0

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

6x=-108

x=-108/6

x=-18

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