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27=4x+2x+9
We move all terms to the left:
27-(4x+2x+9)=0
We add all the numbers together, and all the variables
-(6x+9)+27=0
We get rid of parentheses
-6x-9+27=0
We add all the numbers together, and all the variables
-6x+18=0
We move all terms containing x to the left, all other terms to the right
-6x=-18
x=-18/-6
x=+3
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