Question

If x=5and y=3 is a solution of 3x+ky=3find k

Answer 1

3(5)+k(3)=3
15+3k=3
3k=3-15
3k=-12
k=√-12
k=2√3

Answer 2

$3x + ky = 3 \\ we \: have \: x = 5 \: and \: y = 3 \\ 3 \times 5 + k3 = 3 \\ 15 + k3 = 3 \\ k3 = 3 - 15 \\ k3 = - 12 \\ k = \frac{ - 12}{3} \\ k = - 4 \: ans$