Question

HELP!! Giving points: In the system of equations shown, a is the coefficient of x. The system has infinitely many solutions. What is the value of a?

x – 2y = 4

ax– 6y = 12

(Please explain your answer)

Answer 1

a=3

Explanation:

x – 2y = 4

ax– 6y = 12

To have infinitely many solutions, the two equations have to be equal

Multiply the first equation by 3

3x -6y = 12

ax -6y = 12

a = 3