Question

The solution of the system of equation -4x - y = -28 x+y=4​

Answer 1

-4x -y = -28

-(4x+y) = -28

4x +y = 28

y = 28 - 4x. eqn(i)

Again,

x +y = 4

x + 28 - 4x = 4. from eqn(i)

28 - 3x = 4

28 - 4 =3x

24/3 = x

x = 8

Again,

putting x = 8 in eqn (i)

y = 28 - 4x

= 28 - 4*8

= 28 - 32

y = -4

Hence,

x = 8

y = -4