Question

find the value of x in the proportion. check your answer. $\frac{21}{7}=\frac{x}{9}$. the solution set is { } (type an integer or a simplified fraction.)

Explanation:

Step1: Cross - multiply

$7x = 21\times9$

Step2: Calculate the right - hand side

$7x=189$

Step3: Solve for x

$x=\frac{189}{7}=27$

Answer:

$27$