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-7+6x=x+18
We move all terms to the left:
-7+6x-(x+18)=0
We get rid of parentheses
6x-x-18-7=0
We add all the numbers together, and all the variables
5x-25=0
We move all terms containing x to the left, all other terms to the right
5x=25
x=25/5
x=5
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