Question

if(2k-1, k)is a solution of the equation 10x-9y=12 then k= 1,2,3,4

Answer 1

10x-9y=12
here x=2k-1 and y = k
so,atq 10(2k-1) - 9k=12
20k-10-9k=12

Answer 2

$x = 2k - 1 \\ y = k \\ 10x - 9y = 12 \\ 10(2k - 1) - 9k = 12 \\ 20k - 10 - 9k = 12 \\ 11k = 22 \\ k = 2$