xy/a - 1/b

Which of the following is equivalent to the above expression?

1. axy - b/ab

2. a - bxy/ab

3. b - axy/ab

4. bxy - a/ab

Question

xy/a - 1/b

Which of the following is equivalent to the above expression?

1. axy - b/ab

2. a - bxy/ab

3. b - axy/ab

4. bxy - a/ab

desmarie · Answer

@jim_thompson5910

thesmartone · Answer

"Which of the following"

Where are the options? :P

thesmartone · Answer

Without seeing the options I can't really tell you what steps to take to get to your answer. :b

desmarie · Answer

sorry .....hold up....I gtg but let me see if I can do it real fast

desmarie · Answer

axy - b/ab

a - bxy/ab

b - axy/ab

bxy - a/ab

desmarie · Answer

@jim_thompson5910

jim_thompson5910 · Answer

what is the LCD of $$\Large \frac{xy}{a} - \frac{1}{b}$$

desmarie · Answer

ab?

jim_thompson5910 · Answer

correct

jim_thompson5910 · Answer

how can we get the first fraction to have a denominator of ab?

jim_thompson5910 · Answer

hint: multiply top and bottom by some expression

desmarie · Answer

multiply it with something that has b in the denominator?

jim_thompson5910 · Answer

|dw:1468538294196:dw|

jim_thompson5910 · Answer

|dw:1468538350634:dw|