3r-5s=-4 5r+3s=16 elimination method

Answer 1

3r-5s= -4
5r+3s= 16

Multiply the 1st equation by 5 and the second by 3...

15r-25s= -20
15r+9s=48

Subtract both

-34s= -68

divide by -34

s=2

substitute

3r-10= -4
3r=6

r=2

Answer 2

sixty is 5/6 of what number

Answer 3

60*6
DUH!