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-x+7=-6x-15
We move all terms to the left:
-x+7-(-6x-15)=0
We add all the numbers together, and all the variables
-1x-(-6x-15)+7=0
We get rid of parentheses
-1x+6x+15+7=0
We add all the numbers together, and all the variables
5x+22=0
We move all terms containing x to the left, all other terms to the right
5x=-22
x=-22/5
x=-4+2/5
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