Respuesta :

-21 = 0.07 z

devide both side by 0.07

-21
----- = z
0.07

z = - 300
Memedy

z= -300

Step-by-step explanation:

Flip the equation so it looks like: 0.07z = -21

Then, divide it by 0.07 on both sides, which gets you -300.

You could also divide it by 7 and then multiply that answer by 100 if you want an extra step