Current location - Training Enrollment Network - Mathematics courses - I want to ask the great god to solve the sixteenth math problem in the second day of junior high school. You'd better teach me how to do this problem.
I want to ask the great god to solve the sixteenth math problem in the second day of junior high school. You'd better teach me how to do this problem.
( 1/x)-( 1/y)=3
= = = & gt(y-x)/(xy)=3
= = = & gty-x=3xy
= = = & gtx-y=-3xy
Then, the original formula = [2 (x-y)-14xy]/[(x-y)-2xy] = [2 * (3xy)-14xy]/[(-3xy)-2xy]