2x+(x+90)=18

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Solution for 2x+(x+90)=18 equation: 



2x+(x+90)=18

We move all terms to the left:

2x+(x+90)-(18)=0

We get rid of parentheses

2x+x+90-18=0

We add all the numbers together, and all the variables

3x+72=0

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

3x=-72

x=-72/3

x=-24

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