(X+11)-(2x+9)+12=18

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Solution for (X+11)-(2x+9)+12=18 equation: 



(X+11)-(2X+9)+12=18

We move all terms to the left:

(X+11)-(2X+9)+12-(18)=0

We add all the numbers together, and all the variables

(X+11)-(2X+9)-6=0

We get rid of parentheses

X-2X+11-9-6=0

We add all the numbers together, and all the variables

-1X-4=0

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

-X=4

X=4/-1

X=-4

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