Question

if x :30 is equivalent + 2:5, then find x

Answer 1

x : 30 = 2 : 5.
∴ x / 30 = 2 /5
∴ x = 30 * 2 / 5
∴ x = 6 * 2
∴ x = 12.

Answer 2

$\frac{x}{30} = \frac{2}{5 } \\ x = \frac{2 \times 30}{5} \\ x = 12$