Question

Q2) If z is directly proportional to x and z = 12 when x = 3, find the value of x when z = 18.

Answer 1

4.5

Explanation:

Answer 2

4.5

Explanation:

→ Set up the direct proportion equation

z = kx

→ Substitute in the values

12 = 3k

→ Divide both sides by 3 to isolate k

4 = k

→ Substitute the value of k back into the original direct proportion equation

z = 4x

→ Substitute the value of z in

18 = 4x

→ Divide both sides by 4 to isolate x

4.5 = x