Question

Find the value of any x-y if
3x-4y = 9 and 4x-3y=12​

Answer 1

Step-by-step explanation:

Answer.

the equations are----------------

3x-4y= 9 -------------------- equation 1

4x-3y =12. ------------------- equation 2

Now multiple equation 1 by -3, we get

-9x+12= -27

and multiple equation 2 by 4, we get

16x-12y = 48

Now adding both the equations,we get

7x =21

x= 3

Putting the value of x in equation 1,we get

3×3-4y=9

-4y=9-9

-4y =0

y=0

Answer.x=3,y=0