Question

4x +y=7and x+4y=2 then x - y =

Answer 1

Answer:

5√7-π~628=~×+7277=£=`=£=~°

Answer 2

Answer:

4x + y = 7

-(4x + 16y = 8). (Multiplying the equation with 4)

___________

-15y = -1

y = 1/15

x +4/15 = 2

x = 2 - 4/15

x = 26/15

x-y = 26/15 - 1/15

x-y = 25/15

x-y = 5/3