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3y-7.8=-9.6
We move all terms to the left:
3y-7.8-(-9.6)=0
We add all the numbers together, and all the variables
3y+1.8=0
We move all terms containing y to the left, all other terms to the right
3y=-1.8
y=-1.8/3
y=-1/1.6666666666667
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