[問題]OG(11th)-PSQ220

[凱薩琳]

John and Mary wewe each paid x dollars in advance to do a certain job together. John worked on the job for 10 hours and Mary worked 2 hours less than John. If Mary gave John y dollars of her payment so that they would have recieved tha same hourly wage, what was the dollar amount, in terms of y, that John wae paid in advance?

(A)4y
(B)5y
(C)6y
(D)8y
(E)9y

Ans:E

[scujean]

[解]j和m原本的薪水个自為x元,j工作10hr而m工作8hr
題目最後問的是x是多少,且要以y來表示x
算式：[x-y]/8=[x+y]/10

[凱薩琳]

我懂了..謝謝