Question

Resolva o sistema
5x-y=3
3x+2y=7

Answer 1

5x - y = 3    .(+2)

3x + 2y = 7

       10x - 2y = 6

   +  3x + 2y = 7

      -----------------

13x = 13

x= 13/13

x= 1

3x + 2y = 7

3.( 1 ) + 2y = 7

3 + 2y = 7

2y = 7 - 3

2y = 4

y = 4/2

y=2

Si:{1,2}

    x,y

Answer 2

Resposta:

x=1 e y=2

S=(1, 2)

Explicação passo-a-passo:

 2.(5x- y=3 )

  10x -2y=6  

+   3x+2y=7

=  13x  =  13

= x = 13/13 = 1

3 . 1 +2y=7

 = 2y= 7- 3=4

  = y= 4/2=2

x=1 e y=2

S=(1, 2)