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2(5+2/5y)-3y=21
We move all terms to the left:
2(5+2/5y)-3y-(21)=0
Domain of the equation: 5y)!=0We add all the numbers together, and all the variables
y!=0/1
y!=0
y∈R
2(2/5y+5)-3y-21=0
We add all the numbers together, and all the variables
-3y+2(2/5y+5)-21=0
We multiply parentheses
-3y+4y+10-21=0
We add all the numbers together, and all the variables
y-11=0
We move all terms containing y to the left, all other terms to the right
y=11
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