Question

if 4x-y=4;x-4y=16 then find x-y=?​

Answer 1

SOLUTION

4x + y = 34                       .....(I)

x + 4y = 16                      .......(II)

Adding (I) and (II) we get

5x + 5y = 50

⇒ x + y = 10                   ......(III)

Subtracting (II) from (I) we get

3x - 3y = 18

⇒ x - y = 6                      ......(IV)

(III) + (IV)

2x = 16

⇒ x = 8

Putting the value of x in (I) we get

4 (8) + y = 34

⇒ y = 34 - 32 = 2

⇒ y = 2

Thus, x = 8 , y =