If 5x +4y and 4x +3y =5

15x +12y =18
16x +12y = 20

31x/31= 38/31
x= 1 7/31

20x +16y =24
20x +15y = 5
31/y/31 = 29/31
y=29/31

x +y = 1 7/31 + 29/31
2 5/31

1 answer

this is way out there for us, she's only in 5th grade, but thank you