Respuesta :

kanoelanikipi

Answer:

42

Step-by-step explanation:

You can find this by subtracting 15 from 57. This will give you 42. 42+15=57

aal110

Answer: d=42

Step-by-step explanation:

D+15=57

d+15-15=57-15.   Subtract 15 from both sides

d=42

hoped this helped:)