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-10x-(3x-7)=4
We move all terms to the left:
-10x-(3x-7)-(4)=0
We get rid of parentheses
-10x-3x+7-4=0
We add all the numbers together, and all the variables
-13x+3=0
We move all terms containing x to the left, all other terms to the right
-13x=-3
x=-3/-13
x=3/13
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