Respuesta :

devishri1977

Answer:

(3 , 1)

Step-by-step explanation:

3x - y = 8          -----------------(I)

x + 2y = 5   ------------(II)

Multiply (I) by 2 and then add. Thus y will be eliminates and we can find the value of x

(I)*2    6x - 2y = 16

(II)        x  + 2y = 5

          7x         = 21

            x       = 21/7

x = 3

Plugin x = 3 in equation (II)

3 + 2y = 5

      2y  = 5 - 3

      2y = 2

        y = 2/2

y = 1

namwanjemacklineeliz

Answer:

(3,1)

[tex]3x - y = 8(1) \\ x + 2y = 5(2) \\ from \: equation \:( 2 )\: \\ x = 5 - 2y \\ substitution \: in \: equation \: (1) \\ 3(5 - 2y) - y = 8 \\ 15 - 6y - y = 8 \\ - 7y = 8 - 15 \\ - 7y = - 7 \frac{ - 7y}{ - 7} = \frac{ - 7}{ - 7} \\ y = 1 \\ x = 5 - 2y \\ = 5 - 2(1) \\ = 5 - 2 \\ = 3 \\ (3 \: 1)[/tex]

Step-by-step explanation:

HOPE THAT THIS HELPFUL .

HAVE A GREAT DAY.