15y-8.5y=78

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Solution for 15y-8.5y=78 equation: 



15y-8.5y=78

We move all terms to the left:

15y-8.5y-(78)=0

We add all the numbers together, and all the variables

6.5y-78=0

We move all terms containing y to the left, all other terms to the right

6.5y=78

y=78/6.5

y=12

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