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-30=5x+7x-6
We move all terms to the left:
-30-(5x+7x-6)=0
We add all the numbers together, and all the variables
-(12x-6)-30=0
We get rid of parentheses
-12x+6-30=0
We add all the numbers together, and all the variables
-12x-24=0
We move all terms containing x to the left, all other terms to the right
-12x=24
x=24/-12
x=-2
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