Respuesta :

Answer:

(a) 4

(b) 2/3

Step-by-step explanation:

(a) 4y+3=19

4y=19-3

4y=16

y=4

(b) 12n-3=5

12n=5+3

12n=8

n=8/12

n=2/3

A.4
B. 2/3
Because is makes sense