Question

x-y=16
x=y=74

x-y=1
x=y=9

Answer 1

X - Y = 16
X - Y = 74
16 + Y + Y = 74
2y = 74 - 16
2y = 58
Y = 58/2 = 29
Y = 29

X = 16 + Y
X = 16 + 29
X = 45

X = 45
Y = 29
...

X - Y = 1
X + Y = 9
1 + y + y = 9
2y = 9 - 1
Y = 8/2 => y = 4

X - y = 1
X - 4 = 1
X = 1 + 4 = 5
Resp.
X = 5
Y = 4