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3y=5.7+5.2+5.3+5.4
We move all terms to the left:
3y-(5.7+5.2+5.3+5.4)=0
We add all the numbers together, and all the variables
3y-(21.6)=0
We add all the numbers together, and all the variables
3y-21.6=0
We move all terms containing y to the left, all other terms to the right
3y=21.6
y=21.6/3
y=7+0.6/3
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