Question

Solve the following pair of equations for x and y :
3x+2y=9xy ; 9x+4y=21xy ; x, y ≠ 0.

Answer 1

do you know the method of elimination ?

Answer 2

multiply 1st equation by 3 and subtract it from 2nd equation, what do u get ?

Answer 3

yup
elimination method...

Answer 4

10y = 48 xy?

Answer 5

did you add, instead of subtracting ? :P

Answer 6

subtract

Answer 7

cut the 9's

Answer 8

9x+6y=27xy

subtract from
9x+4y=21xy

so, whats 6y-4y =... ?

Answer 9

i thnk we shud multiply by -3 and add

Answer 10

2y

Answer 11

multiply by +3 and subtract
is exactly equivalent to
multiply by -3 and add

do what you are comfortable with :)

Answer 12

you should get 2y=6xy in the end, ask me if you don't get that

Answer 13

yup...............finally gt it..................thnx man!!

Answer 14

welcome ^_^