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-42-(-38)=x/10
We move all terms to the left:
-42-(-38)-(x/10)=0
We add all the numbers together, and all the variables
-(+x/10)-42-(-38)=0
We add all the numbers together, and all the variables
-(+x/10)-4=0
We get rid of parentheses
-x/10-4=0
We multiply all the terms by the denominator
-x-4*10=0
We add all the numbers together, and all the variables
-1x-40=0
We move all terms containing x to the left, all other terms to the right
-x=40
x=40/-1
x=-40
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