Question

25. 2x + 3y = 7,
(a+b)x + (2a - b) y = 21.​

Answer 1

Answer:

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

(A) a = 1, b = 5

(B) a = 5, b = 1

(C) a = – 1, b = + 5

(D) a = 5, b = – 1

Answer 2

Answer:

a = 5

b = 1

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