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2.9=8.5+y
We move all terms to the left:
2.9-(8.5+y)=0
We add all the numbers together, and all the variables
-(y+8.5)+2.9=0
We get rid of parentheses
-y-8.5+2.9=0
We add all the numbers together, and all the variables
-1y-5.6=0
We move all terms containing y to the left, all other terms to the right
-y=5.6
y=5.6/-1
y=-5+0.6/1
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