Question

4+a=b write a pair of numbers for a and b to make the eqaution true

Answer 1

a=1
b=5

its very simple

Answer 2

Given,

4+a=b
let ,
The pair numbers be 1 and 5

i.e,
a=1
b=5

4+1=5.
And ,

Many like (0,4);(4,8);(6,10)etc..

Hope it helps..☆☆