Let’s say our numbers are x, y and z, where x>y>z.
x + y + z = 61
x - z = 50
y + z = 16
We can add those last two together and get
x + y = 66
We can put that into the first equation:
66 + z = 61
From here we get that z = -5.
So:
x - (-5) = 50
x + 5 = 50
x = 45
We add this into the first:
45 + (-5) + y = 61
40 + y = 61
y = 21
Lets check:
45 - 5 + 21 = 61
45 - (-5) = 45 + 5 = 50
21 + (-5) = 21 - 5 = 16
