3x=9x-90

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Solution for 3x=9x-90 equation: 



3x=9x-90

We move all terms to the left:

3x-(9x-90)=0

We get rid of parentheses

3x-9x+90=0

We add all the numbers together, and all the variables

-6x+90=0

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

-6x=-90

x=-90/-6

x=+15

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