8=-1+x+2x

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Solution for 8=-1+x+2x equation: 



8=-1+x+2x

We move all terms to the left:

8-(-1+x+2x)=0

We add all the numbers together, and all the variables

-(3x-1)+8=0

We get rid of parentheses

-3x+1+8=0

We add all the numbers together, and all the variables

-3x+9=0

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

-3x=-9

x=-9/-3

x=+3

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