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-12-x=5x+18
We move all terms to the left:
-12-x-(5x+18)=0
We add all the numbers together, and all the variables
-1x-(5x+18)-12=0
We get rid of parentheses
-1x-5x-18-12=0
We add all the numbers together, and all the variables
-6x-30=0
We move all terms containing x to the left, all other terms to the right
-6x=30
x=30/-6
x=-5
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