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4.2=x/0.7
We move all terms to the left:
4.2-(x/0.7)=0
We add all the numbers together, and all the variables
-(+x/0.7)+4.2=0
We get rid of parentheses
-x/0.7+4.2=0
We multiply all the terms by the denominator
-x+(4.2)*0.7=0
We add all the numbers together, and all the variables
-1x+2.94=0
We move all terms containing x to the left, all other terms to the right
-x=-2.94
x=-2.94/-1
x=2+0.94/1
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