2x+x-18=-30-x

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Solution for 2x+x-18=-30-x equation: 



2x+x-18=-30-x

We move all terms to the left:

2x+x-18-(-30-x)=0

We add all the numbers together, and all the variables

2x+x-(-1x-30)-18=0

We add all the numbers together, and all the variables

3x-(-1x-30)-18=0

We get rid of parentheses

3x+1x+30-18=0

We add all the numbers together, and all the variables

4x+12=0

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

4x=-12

x=-12/4

x=-3

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