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7.2y+4=-10.4
We move all terms to the left:
7.2y+4-(-10.4)=0
We add all the numbers together, and all the variables
7.2y+14.4=0
We move all terms containing y to the left, all other terms to the right
7.2y=-14.4
y=-14.4/7.2
y=-2
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