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13=5+y/0.2
We move all terms to the left:
13-(5+y/0.2)=0
We add all the numbers together, and all the variables
-(y/0.2+5)+13=0
We get rid of parentheses
-y/0.2-5+13=0
We multiply all the terms by the denominator
-y-5*0.2+13*0.2=0
We add all the numbers together, and all the variables
-1y+1.6=0
We move all terms containing y to the left, all other terms to the right
-y=-1.6
y=-1.6/-1
y=1+0.6/1
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