Question

If the system of equations 2x+3y=7and ,(a+b)x+(2a-b)y=21has infinity many solutions, then

Answer 1

Answer:

a = 5, b = 1

Step-by-step explanation:

Let's multiply 2x + 3y = 7 by "3" then

6x + 9y = 21 , thus

a + b = 6

2a - b = 9

3a = 15 ===> a = 5

b = 1