Question

2x+3y=7. 3x+2y=0 x- y=?​

Answer 1

Answer:

-77/2

Step-by-step explanation:

2x+3y=7--------1

3x+2y=0--------2

from 1,

x=(7-3y)/2

sub on 2,

===>3x+2y=0

       3(7-3y)/2+2y=0

       (21-9y)/2+2y=0

       21/2-9y/2+2y=0

       (-9y+4y)/2=-21/2

       -5y/2=-21/2

===>5y=21

      y=21/5

=>x=(7-3y)/2

     =(7-63/5)/2

     =[(35-63)/5]/2

     =[-28/5]/2

    x=-56/5

x- y=[-56-21]/2

    =-77/2