solve for x and y
|x y| minus |-y x|
|-y x| |x y | equals |4 6|
|-4 6|
does anyone know how to do this?

Question

solve for x and y 
|x y|   minus  |-y x|
|-y x|             |x y  | equals |4 6|
                                           |-4 6| 
does anyone know how to do this?

myininaya · Answer

ok so you have x+y=4, y-x=6, -y-x=-4, x-y=6 correct?

anonymous · Answer

right

anonymous · Answer

Its a matrix problem

myininaya · Answer

x+y=4   =>   y=4-x,  then (4-x)-x=6  
4-2x=6    =>   -2x=6/4=3/2     =>  x=-3/4
so y=4-x=4-(-3/4)=4+3/4=16/4+3/4=19/4

anonymous · Answer

im a little confused

myininaya · Answer

what bothers you?

anonymous · Answer

explain to me where the 2 came from? was it when you added the 2 ys and xs of the matrix?

myininaya · Answer

ok i took the first equation and solved it for y and then I wrote the second equation in terms of x so i only had one unknown in this equation

anonymous · Answer

ok

anonymous · Answer

aw i see. thanks for your help!

myininaya · Answer

one sec okay?

myininaya · Answer

dont leave I have something for you

myininaya · Answer

I made a mistake. Click on this attachment,

anonymous · Answer

ok

anonymous · Answer

so x =-1. I didnt see what y equaled.

myininaya · Answer

you don't see y=4-(-1)=4+1=5

anonymous · Answer

ok i see it so y=5

myininaya · Answer

lol i ran out of room to put it on one line

anonymous · Answer

Thats ok i really appreciate your help. THANK YOU!

myininaya · Answer

np