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-10-2x=-7x
We move all terms to the left:
-10-2x-(-7x)=0
We get rid of parentheses
-2x+7x-10=0
We add all the numbers together, and all the variables
5x-10=0
We move all terms containing x to the left, all other terms to the right
5x=10
x=10/5
x=2
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