Respuesta :

28lakhania

Answer:

15

Step-by-step explanation:

21/3=7

x=y/7

so 105/7=x

the answer is 105/7=15

bluegreen24

Answer: x = 15

Step-by-step explanation: Proportions.

  • 3/21 = x/105 (cross multiply)
  • 105*3 = 21x (simplify)
  • 315 = 21x (divide)
  • 15 = x