SOLUTION: How would I set this problem up as an equation to solve? On Wednesday, John drove to school in 45 minutes. On Thursday, he had a test at school so he averaged 12 miles per ho

Question 86448: How would I set this problem up as an equation to solve?

On Wednesday, John drove to school in 45 minutes. On Thursday, he had a test at school so he averaged 12 miles per hour more, and it took him 9 minutes less to get to school. How far does he travel to school?
Answer by scianci(186) (Show Source): You can put this solution on YOUR website!
(rate)(time) = (rate)(time)
time Wed. = 3/4 hr.
time Thur. = 36 min. = 3/5 hr.
rate Thur. = 12 + rate Wed.
use a variable for rate Wed.
plug the resulting expressions into the above algorithm for the rates
plug 3/4 and 3/5 in for the times
solve the resulting equation for the variable
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