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2.4=4.2+2y
We move all terms to the left:
2.4-(4.2+2y)=0
We add all the numbers together, and all the variables
-(2y+4.2)+2.4=0
We get rid of parentheses
-2y-4.2+2.4=0
We add all the numbers together, and all the variables
-2y-1.8=0
We move all terms containing y to the left, all other terms to the right
-2y=1.8
y=1.8/-2
y=-1/1.1111111111111
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