3y-x=3-(1) 2/3y-1/x=2-(2) plz answer this simultaneous question

Hannah works at the mall selling book bags. she sold 35 book bags in 5 hours. how many book bags did she sell per hour?

In a school 2/3 of the students study a language of those who study a language 2/5 study french

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is: