Jawapan

2016-03-16T22:21:21+08:00
2016-03-16T22:24:00+08:00
X-y=3
x+y=13

x=3+y
3+y+y=13
3+2y=13
2y=10
y=5

x-5=3
x=8

the numbers are 5 and 8.