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0.12(y-7)+0.02y=0.04y-0.4
We move all terms to the left:
0.12(y-7)+0.02y-(0.04y-0.4)=0
We add all the numbers together, and all the variables
0.02y+0.12(y-7)-(0.04y-0.4)=0
We multiply parentheses
0.02y+0.12y-(0.04y-0.4)-0.84=0
We get rid of parentheses
0.02y+0.12y-0.04y+0.4-0.84=0
We add all the numbers together, and all the variables
0.1y-0.44=0
We move all terms containing y to the left, all other terms to the right
0.1y=0.44
y=0.44/0.1
y=4+0.04/0.1
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