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12y-7y-4=66.75
We move all terms to the left:
12y-7y-4-(66.75)=0
We add all the numbers together, and all the variables
5y-70.75=0
We move all terms containing y to the left, all other terms to the right
5y=70.75
y=70.75/5
y=14+0.75/5
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