Question

sum of two number is 10 and their difference is 6 find the number

Answer 1

x+y=10
x-y=6
2x=16
x=8
8-y=6
y=2

Answer 2

let the two nos be x and y
x-y =6 eq 1
x+y=10 eq 2
adding both equations we get
2x=16
x=8
thus the nos. are
x=8
y=10-x=10-8=2