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0.12+0.06(y+4000)=1680
We move all terms to the left:
0.12+0.06(y+4000)-(1680)=0
We add all the numbers together, and all the variables
0.06(y+4000)-1679.88=0
We multiply parentheses
0.06y+240-1679.88=0
We add all the numbers together, and all the variables
0.06y-1439.88=0
We move all terms containing y to the left, all other terms to the right
0.06y=1439.88
y=1439.88/0.06
y=23998+2.27373675443E-13/0.06
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