Question

find the value of k 1)ifx=3,y=1is a solution of 5x+ky=9 2)x=1,y=-3is a solution of kx-y =8

Answer 1

5(3)+k1=9
15+k=9
k=15-9
k=6

Answer 2

1) 5x +ky =9
5(3) + k(1) = 9
15 + k = 9
K= 9 - 15
K = -6

2). Kx - y = 8
K(1) - (-3) = 8
K + 3 = 8
K = 8-3
K = 5