Question

x - y=8
2x + 3y=8

???

Answer 1

x   -  y = 8 .(3)
2x+3y = 8

3x - 3y = 24
2x + 3y =  8
-------------------
5x = 32
x = 32/5

32/5 - y = 8
32/5 - 5y/5 = 40/5
-5y/5 = 40/5 - 32/5
-5y/5 = 8/5
-5y = 8 .(-1)
5y = -8
y = -8/5

S: {32/5; -8/5}