Need help ( 8th grade math)

Solve 2x+y=3 x+y=5 in substitution method

Adriver from the university of florida women’s swimming and diving team is competing in the in ncaa zone b championships

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.