A gasoline tank is $\frac78$ full. After $12$ gallons have been used, it is half full. How many gallons does this tank hold when it is full?
Question:
A gasoline tank is $\frac78$ full. After $12$ gallons have been used, it is half full. How many gallons does this tank hold when it is full?
Answer:
Let's think step by step.

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A gasoline tank is $\frac78$ full. After $12$ gallons have been used, it is half full. How many gallons does this tank hold when it is full?
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