I think this belongs in the math section but anyways
x/y = 3/4
x+4/y+4 = 10/13
x = 3/4y
x+4 = 10/13(y+4)
x = 10/13(y+4) - 4
3/4 y = 10/13(y+4) - 4
3/4 y - 10/13y - 12/13
-1/52 y = -12/13
1/52 y = 12/13
y = 48
x = 36
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36+4 = 40
48+4 = 52
40:52 = 10:13
The original numbers were 36 and 48
Hope this helps!
