Question

if the point (2 , -5) lies on the graph of the equation 2ax-y=1,find the value of a​

Answer 1

Answer:

a= -1

Step-by-step explanation:

(x,y) = (2,-5)

given:

2ax-y = 1

(substitute x=2; y= -5)

2(2)(a) - (-5) = 1

4a+5 = 1

(both side add with -5 )

4a = 1 - 5

4a = -4

(both sides divide by 4 )

4a/4 = -4/4

(cancellation by multiples of 4)

a = -1