Question

The value of k which the system of equation 2x +3y =5 and 4x + ky = 10 has infinite number of solution is

Answer 1

In the case of infinite solutions the values of 1st equation are proportional to the values of 2nd therefore the value of k = 6

Answer 2

$2 \div 4 = 3 \div k \: \: \: \: then \: \: \: k = 6$