Question

x+y=5 , y+z=3 , x+z=4

Answer 1

Answer:

x+y=5

=x=5-y

x+z=4

=5-y+z=4

=-y+z=4-5

=-y+z=-1

y+z=3

-. -. -

-2y=-4

y=2

x=5-y

=5-2

=3

x+z=4

3+z=4

z=4-3

=1

Answer 2

Hi

We ll start with the first eqn

x + y = 5

x=5 - y.......(i)

y + z =3

z = 3-y........(ii)

x + z = 4.......(iii)

Put values of x and y from (i) and (ii) eqns in eqn (iii)

5-y + 3-y= 4

8 - 2y= 4

2y= 4

y=2.......(1)

Put (1) in (i) and (ii) eqns

x= 5-2

x= 3.......(2)

z= 3-2

z= 1.........(3)

(1), (2) and (3) are the answers

Hope this helps!