Question

If z is directly proportional to x and z=12 when x=3,find the value of x when z=18​

Answer 1

Answer:

x=9

Step-by-step explanation:

if z=12 and x=3

then,

z-x=12-3=9

which implies, if z=18

then, x=18-9

          =9

Answer 2

Answer:

$z \infty x \\ 12 \infty 3 \\ 12 = k3 \\ k = \frac{12}{3} \\ = 4 \\ when \: z = kx \\ z= 18 \\ z = 4 \times x \\ x = \frac{18}{4} \\ = 4.5 \\ thank \: you$