Question

If (2,1) is a solution of ax+2y-1=0 what is the value of a

a)1/2

b)-1/2

c)1

d)-1​

Answer 1

Answer:

b:-1/2

Step-by-step explanation:

given (2,1) is sol of ax+2y-1=0

therefore sub (2,1) in given eq

a(2)+2(1)-1=0

2a+2-1=0

2a+1=0

2a=-1

a=-1/2

Answer 2

Answer:

The answer is B)

Hope it helps you