I did this on my copy, hope you'll understand it, I tried my best to explain.
Hello, do you know that for any a, b and c real numbers with c different from 0 the following is correct?

Then,

So,

Thank you.
Answer:
7 1/8 or 7.125
Step-by-step explanation:
first subsitute z for 4
28/4 - 4/4 + 1 1/8
then do 28/4 - 4/4 which is 6,
add that to 1 1/8
and get 7 1/8
Answer:
it would actually be the opposite because if u multiply ur making the number higher, it can be a fraction but it would be 23/1 and thats a whole number u would need to divide by 100 and 100 bc if 10 u get 2 3/10 and if u divide by 100 u get 23/100 either way u get a fraction but if u divide by 10 u get a mixed fraction. If u just want a fraction u would have to divide from 100
Step-by-step explanation:
the same is for dividing decimals