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4.2=1.4y
We move all terms to the left:
4.2-(1.4y)=0
We add all the numbers together, and all the variables
-(+1.4y)+4.2=0
We get rid of parentheses
-1.4y+4.2=0
We move all terms containing y to the left, all other terms to the right
-1.4y=-4.2
y=-4.2/-1.4
y=3+8.8817841970013E-16/1.4
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