Respuesta :

bayan00

Answer:

x=7

Step-by-step explanation:

55=2x+(x+4)+[3(x+3)]

55=2x+x+4+3x+9

55=6x+13

55-13=6x

42=6x

7=x

mhanifa

Answer:

  • 7 inches

Step-by-step explanation:

Perimeter is the sum of side lengths:

  • P = 2x + x + 4 + 3(x + 3)
  • P = 55

Solve for x:

  • 2x + x + 4 + 3(x + 3) = 55
  • 3x + 4 + 3x + 9 = 55
  • 6x + 13 = 55
  • 6x = 55 - 13
  • 6x = 42
  • x = 42/6
  • x = 7