-3(x+2x)=18-x

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Solution for -3(x+2x)=18-x equation: 



-3(x+2x)=18-x

We move all terms to the left:

-3(x+2x)-(18-x)=0

We add all the numbers together, and all the variables

-3(+3x)-(-1x+18)=0

We multiply parentheses

-9x-(-1x+18)=0

We get rid of parentheses

-9x+1x-18=0

We add all the numbers together, and all the variables

-8x-18=0

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

-8x=18

x=18/-8

x=-2+1/4

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