Respuesta :

nkuvaeva2008

Answer:

y=13

Step-by-step explanation:

12-y=-1

-y=-13

y=13

Answer:

Step-by-step explanation:

Here you go mate

Step 1

x=4  

Step 2

3x-y=-1  Substitute 4 for x

(3)(4)-y=-1

-y=-13

Step 3

-y=-13  Divide both sides

answer

y=13