Question

if the point (2,1) is the solution of the linear equation 2x+6y=2k , then find the value of K​

Answer 1

if the point (2,1) is the solution of 2x+6y = 2k ................ (1)

put x = 2 and y = 1 in (1)

2+2×6×1 = 2k

10 = 2k

k = 5