I need to find out how to calculate a=8c-b divided by c, how?

I'm not sure how to answer your question because you didnt specify if you're looking for the value of a, b, or c.

If you're looking for the value of C:

1. Multiply both sides by C

ca=8c-b

2. Subtract 8C from both sides.

ca-8c=-b

3. Factor out the common term C.

c (a-8) = -b

4. Divide both sides by A-8.

Answer = c=b over a-8

I'm not sure how to answer your question because you didnt specify if you're looking for the value of a, b, or c.

If you're looking for the value of C:

1. Multiply both sides by C

ca=8c-b

2. Subtract 8C from both sides.

ca-8c=-b

3. Factor out the common term C.

c (a-8) = -b

4. Divide both sides by A-8.

Answer = c=b over a-8