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4.2=-3+x
We move all terms to the left:
4.2-(-3+x)=0
We add all the numbers together, and all the variables
-(x-3)+4.2=0
We get rid of parentheses
-x+3+4.2=0
We add all the numbers together, and all the variables
-1x+7.2=0
We move all terms containing x to the left, all other terms to the right
-x=-7.2
x=-7.2/-1
x=7+0.2/1
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