Respuesta :

Answer:

y = 8

RS = 60

ST = 46

Step-by-step explanation:

RS + ST = RS

7y + 4 + 5y + 6 = 106

12y + 10 = 106

12y = 96

y = 8

RS = 7y + 4 = 7*8+4 = 60

ST = 5y + 6 = 5*8+6 = 46