Question

a+b=5k
Find the value of k if a&b are equal

Answer 1

If a = b 

then  

a + a = 5k 

2a = 5k


k = 2a/5 

or =  2b/5 

Answer 2

as a=b
then a+b=5k
a+a=5k
2a=5k
2a/5=k
this is the answer
hope this helps you