2x+x=6x+90

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Solution for 2x+x=6x+90 equation: 



2x+x=6x+90

We move all terms to the left:

2x+x-(6x+90)=0

We add all the numbers together, and all the variables

3x-(6x+90)=0

We get rid of parentheses

3x-6x-90=0

We add all the numbers together, and all the variables

-3x-90=0

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

-3x=90

x=90/-3

x=-30

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