Question

a+b= 9 and b= a/2 then the value of a is a) 3 b) 6 c) 5 d)4​

Answer 1

Answer:

6

from 1st equation we get

b = 9-a

sub the above in second equation we get

9-a = a/2

bring 2 to LHS

18- 2a =a

18 = 3a

a =18/3

a=6

Answer 2

Option b....

a +b = 9

b = a/2

Putting b's value in given equation.

a + a/2 = 9

3a = 18

a = 6

Hope it helps you out!!!!