Respuesta :

sup3rman2295

Answer:

the length is 21

Step-by-step explanation:

50-4-4=42÷2=21

23franklini

Answer:

21

Step-by-step explanation:

4 + 4 = 8 (the widths added together)

50 - 8 = 42 (what remains)

42/2 = 21 (the length of the rectangle)

4 + 4 + 21 +21 = 50