The instructions were to find the LCD of the three. I factored as follows:

X-7 = x-7

3x-21 = 3(x-7)

6x=6x

Therefore my answer was x-7, 3 and 6x.

- Sat Jan 23, 2016 5:03 am
- Forum: Beginning Algebra
- Topic: LCD inquiry
- Replies:
**3** - Views:
**974**

The instructions were to find the LCD of the three. I factored as follows:

X-7 = x-7

3x-21 = 3(x-7)

6x=6x

Therefore my answer was x-7, 3 and 6x.

X-7 = x-7

3x-21 = 3(x-7)

6x=6x

Therefore my answer was x-7, 3 and 6x.

- Wed Jan 20, 2016 10:23 pm
- Forum: Beginning Algebra
- Topic: LCD inquiry
- Replies:
**3** - Views:
**974**

X-7, 3x-21, 6x

My answer was 3, x-7, 6x

Correct answer per the book is 6x, x-7.

What happened to the 3?

My answer was 3, x-7, 6x

Correct answer per the book is 6x, x-7.

What happened to the 3?

- Wed Jun 03, 2015 8:36 pm
- Forum: Intermediate Algebra
- Topic: Rational Expression Multiplication
- Replies:
**1** - Views:
**1069**

I have worked and reworked the multiplication below, but can't get the correct answer. Can somebody let me know how the answer provided below is to be reached? Thanks in advance.

ab-a+3b-3 x ab+2a-4b-8

ab+a+4b-4 ab+2a+3b-6

**Answer**

b^2+b-2

b^2-b-2

ab-a+3b-3 x ab+2a-4b-8

ab+a+4b-4 ab+2a+3b-6

b^2+b-2

b^2-b-2

- Sun Jan 05, 2014 4:18 am
- Forum: Intermediate Algebra
- Topic: Fraction word problem
- Replies:
**1** - Views:
**1700**

I have worked this a few times and keep ending up with 45/7 for the answer. The book says -9 is the answer. Any help is appreciated! When a certain number is added to the numerator and subtracted from the denominator of the fraction 3/8, the result is 6. What is the number? I have tried the followin...