SOLUTION: Help. Problem: (4/x-y)- (3/y) The answer is supposed to be 7y-3x/y(x-y) I get the denominator but I don't get how they come up with 7y

Algebra ->  Expressions-with-variables -> SOLUTION: Help. Problem: (4/x-y)- (3/y) The answer is supposed to be 7y-3x/y(x-y) I get the denominator but I don't get how they come up with 7y      Log On


   

Question 39143This question is from textbook Saxon Algebra 1
: Help.
Problem: (4/x-y)- (3/y)
The answer is supposed to be 7y-3x/y(x-y)
I get the denominator but I don't get how they come up with 7y This question is from textbook Saxon Algebra 1

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
(4/x-y)- (3/y)
[4(y)-3(x-y)]/[y(x-y)]
=[4y-3x+3y]/y(x-y)]
=[7y-3x]/[y(x-y]