## Trending News

# math help!? what is (ab-a) ÷ (bc-c)?

(ab-a) ÷ (bc-c)

answer: a÷c

Can you explain step by step how to do it?

if (ab-a) ÷ (bc-c) = a(b-1)/c(b-1)

aren't you substituting 1 into c and a. But I don't know the value..

### 7 Answers

- 9 years agoFavorite Answer
Basically what you have to do is factorise the brackets.

(ab-a) will factorise to a(b-1)

(bc-c) will factorise to c(b-1).

Then you have a(b-1) / c(b-1) so then the (b-1) will cancel out leaving a/c.

- halfLv 44 years ago
commencing: ab + c = bc - a upload a to the two aspects: ab + a + c = bc Subtract c from the two aspects: ab + a = bc - c element* the two aspects: a(b+a million) = c(b-a million) Dividing the two aspects by (b+a million): a = c(b-a million)/(b+a million) To element an expression, you come across the GCF of each and every term interior the expression, then extract that. So in ab+a, the GCF of each and every term is a. as a result, extract the a, by dividing each and every term by a, which components b+a million. The GCF must be integrated for it to have a similar cost because of the fact the unique expression even with the shown fact that, so that's written as a(b+a million).

- How do you think about the answers? You can sign in to vote the answer.
- ZarnLv 79 years ago
(ab - a) can be rewritten as a(b - 1)

(bc - c) can be rewritten as c(b - 1)

Therefore, the expression (ab-a) / (bc - c) can be rewritten as (a(b - 1)) / c(b - 1))

Provided that b - 1 is not zero, then it is easy to see by inspection that (ab-a) / (bc - c) = (a(b - 1)) / c(b - 1)) = a / c