Answers

2016-03-31T06:24:40+05:30

(a+2b)x+(2a-b)y=2 →  (3)

(a-2b)x+(2a+b)y=3 → (4)

Multiply (3) with (a − 2b) and (4) with (a + 2b)

(a − 2b)(a+2b)x + (a − 2b)(2a-b)y = 2(a − 2b) →  (5)

(a + 2b)(a − 2b)x + (a − 2b)(2a+b)y = 3(a + 2b) →   (6)

Subtract (6) from (5), we get

1 5 1