Respuesta :

evanc7515

Answer:

21 (Verified Answer) ✅

Step-by-step explanation:

A proportion is solved by cross multiplying.

3x = 21

x = 7

Now, let's check it

3(7) = 21 x 1

21 = 21 ✅

okand7

Answer:

x=7

Step-by-step explanation:

CROSS MULTIPLY

x/21=1/3

3*x=3x

21*1=21

3x=21

x=7