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4.2=-5+x
We move all terms to the left:
4.2-(-5+x)=0
We add all the numbers together, and all the variables
-(x-5)+4.2=0
We get rid of parentheses
-x+5+4.2=0
We add all the numbers together, and all the variables
-1x+9.2=0
We move all terms containing x to the left, all other terms to the right
-x=-9.2
x=-9.2/-1
x=9+0.2/1
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