Question

Find k , if 7x+ky=10 has (1,2) solutions

Answer 1

Answer:

(1, 2) satisfies the given eqn

put x=1 and y=2 we get

7(1)+ k(2) =10

7+2k=10

2k=10-7

2k=3

k=3/2

Answer 2

Answer:

let x=1&y=2,

7*1+k*2=10

7+2k=10

2k=10-7

2k=3

k=3/2