You ride an express bus from the center of town to your street. You have two payment options. Option a is to buy a monthly pass
1 answer:
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In the left hand side, you're multiplying 7.8 by
In the right hand side, you're multiplying again 7.8 by a mysterious number.
So, the unknown number must be
Every number remains unchanged when multiplied by 1, so the answer is 3.6
