Question

The difference between two numbers is 80 seven times the smaller is equal to four more than the larger what are the numbers

Answer 1

Answer:

X-y=5, x=y+5

3X=4y+7, 3{y+5)=4y+7, 3y+15=4y+7, 15-7-4y-3y

8=y, y=8

X-8=5, x =13

13,8

Q.E.D.