Question

find k if (3,k) is a solution of 6x + 5y = 3

Answer 1

As (3,k) is the solution of equation 6x+5y=3,
put x=3 and y=k
6(3)+5k=3
18+5k=3
5k=-15
k=-15/5
k=-3

Answer 2

put x=3 and y =k
6(3)+5k=3
18+5k=3
5k =3-18
5k=-15
k=5\-15
k=-3