Five times a number minus twice another number equals twenty-two. The sum of the numbers is three. Find the numbers?

Someone please help ASAP

Ithink i know it but i want to be sure so can you me out ?

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.