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7y-4y-15=28.08
We move all terms to the left:
7y-4y-15-(28.08)=0
We add all the numbers together, and all the variables
3y-43.08=0
We move all terms containing y to the left, all other terms to the right
3y=43.08
y=43.08/3
y=14+1/2.77777777778
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