Question

As a first step in solving the system shown, Yumiko multiplies both sides of the equation 2x – 3y = 12 by 6. By what factor should she multiply both sides of the other equation so that she can add the equations and eliminate a variable?

5x + 6y = 18
2x – 3y = 12

factor: ?

Answer 1

3

Explanation:

Answer 2

After multiplying both sides of the first equation by 6, Yumiko would obtain:

12x−18y=72

12x−18y=72