SOLUTION: A quarterback completes 12 out of 20 passes in his first game, how many passes would you expect him to complete in his second game if he only throws 15 passes?

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Question 251667: A quarterback completes 12 out of 20 passes in his first game, how many passes
would you expect him to complete in his second game if he only throws 15 passes?

Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = number of passes completed
then
12%2F20+=+x%2F15
multiplying both sides by 20:
12+=+20x%2F15
reducing the fraction on right:
12+=+4x%2F3
multiplying both sides by 3:
36+=+4x
dividing both sides by 4:
9+=+x