Respuesta :

Answer:

8

Step-by-step explanation:

10 - x + x + 3 + 2x - 1 = 28

2x + 12 = 28

2x = 16

x = 8

fieryanswererft

Answer:

x = 8

explanation:

perimeter: total sum of all lengths

  • side 1: 10 -x
  • side 2: 2x - 1
  • side 3: x + 3

Therefore:

10 - x + x + 3 + 2x - 1 = 28

2x + 12 = 28

2x = 28 - 12

2x = 16

x = 8