Question

If the system of equations ax + 4y = 7 and 2x + by = 14 has infinitely many solutions, then the value of a + b is?

Answer 1

Answer:

Step-by-step explanation:

Answer 2

a1 = a

a2 = 2

b1 = 4

b2 = b

c1 = -7

c2 = -14

for infinitely many solutins

a1/ a2= b1/ b2= c1/ c2

a/2 = 4/ b = -7/-14

1))) a/2 = -7/-14

=> 14a = 14

=> a = 1

2)))) 4/b = -7/-14

=> 56 = 7b

=> b = 8 ans

ATQ

a+ b = 1+8 = 9 ans