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2y+20=8+1
We move all terms to the left:
2y+20-(8+1)=0
We add all the numbers together, and all the variables
2y+20-9=0
We add all the numbers together, and all the variables
2y+11=0
We move all terms containing y to the left, all other terms to the right
2y=-11
y=-11/2
y=-5+1/2
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