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-3.5y=-24.5
We move all terms to the left:
-3.5y-(-24.5)=0
We add all the numbers together, and all the variables
-3.5y+24.5=0
We move all terms containing y to the left, all other terms to the right
-3.5y=-24.5
y=-24.5/-3.5
y=+7
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