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-x-2(9-18x)=12
We move all terms to the left:
-x-2(9-18x)-(12)=0
We add all the numbers together, and all the variables
-x-2(-18x+9)-12=0
We add all the numbers together, and all the variables
-1x-2(-18x+9)-12=0
We multiply parentheses
-1x+36x-18-12=0
We add all the numbers together, and all the variables
35x-30=0
We move all terms containing x to the left, all other terms to the right
35x=30
x=30/35
x=6/7
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