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4y=31.2
We move all terms to the left:
4y-(31.2)=0
We add all the numbers together, and all the variables
4y-31.2=0
We move all terms containing y to the left, all other terms to the right
4y=31.2
y=31.2/4
y=7+2.66666666667/3.33333333333
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