Question

If the ordered pairs ( a+2,4) and (5,2a+b) are equal then {a,b} is

Answer 1

If ordered pairs are equal, then there domain and range are also equal.

So, a+2=5

So, a=5-2

a=3

Now 4=2a+b

Putting the value of a, we get;

4=3×2+b

So,4=6+b

Therefore b=-2.