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-4=-7+x.5
We move all terms to the left:
-4-(-7+x.5)=0
We add all the numbers together, and all the variables
-(x.5-7)-4=0
We get rid of parentheses
-x.5+7-4=0
We add all the numbers together, and all the variables
-x.5+3=0
We move all terms containing x to the left, all other terms to the right
-x.5=-3
x=-3/1
x=-3
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