Respuesta :

binaa13

Answer:

-2

Step-by-step explanation:

-3z+1=7

-3z= 7-1

-3z=6 /: (-3)

z= -2

Answer:

z=-2

Step-by-step explanation:

We must cancel out the one by subtracting it by 7 which gives

= -3z=6

Now we divide by 3 which gives

=-z=2

Now it is minus. To get it positive we must make the 3 negative

z=-2