Respuesta :

Answer:

12y + d = -19y + t

31y + d = t

31y= - d + t

y = (- d + t ) / 3 ;)

Answer:

y = (t-d) / 31

Step-by-step explanation:

12y + d = -19y + t

12y + 19y = t - d

31y = t - d

y = (t-d) / 31