[問題] 一題看不懂的數學題
A customer purchased a one-year appliance service contract that cost $15 and
covered payment of 75 percent of each repair bill.
For on year, the cost of the contract together with the total amount of the
repair bills not covered by the contract was equal to the total amount covered
by the contract.
What was the total amount of repair bills for the year?
A)$30
B)$20
C)$15
D)$10
E)$5
Ans:A
有點看不懂題目的意思..
想請各位幫我解答一下.
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