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3.5=x/1.2
We move all terms to the left:
3.5-(x/1.2)=0
We add all the numbers together, and all the variables
-(+x/1.2)+3.5=0
We get rid of parentheses
-x/1.2+3.5=0
We multiply all the terms by the denominator
-x+(3.5)*1.2=0
We add all the numbers together, and all the variables
-1x+4.2=0
We move all terms containing x to the left, all other terms to the right
-x=-4.2
x=-4.2/-1
x=4+0.2/1
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