Question

I do not know how to sole this −21=0.07z

Answer 1

-300

Explanation:

Divide by 0.07 on both sides

-300 = z

You can prove this by multiplying 0.07 by -300

0.07(-300) = -21

I hope this helps!!

Answer 2

Divide 0.07 from -21 to isolate Z and you will receive the answer for Z.
Answer should be 300.
300 = Z