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-7-6x=21-6
We move all terms to the left:
-7-6x-(21-6)=0
We add all the numbers together, and all the variables
-6x-7-15=0
We add all the numbers together, and all the variables
-6x-22=0
We move all terms containing x to the left, all other terms to the right
-6x=22
x=22/-6
x=-3+2/3
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