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-7+x=-3x-7+8x
We move all terms to the left:
-7+x-(-3x-7+8x)=0
We add all the numbers together, and all the variables
x-(5x-7)-7=0
We get rid of parentheses
x-5x+7-7=0
We add all the numbers together, and all the variables
-4x=0
x=0/-4
x=0
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