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.2y+10.5=15
We move all terms to the left:
.2y+10.5-(15)=0
We add all the numbers together, and all the variables
.2y-4.5=0
We move all terms containing y to the left, all other terms to the right
.2y=4.5
y=4.5/.2
y=22+0.1/.2
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