Question

3x + 2y= 13
4x - y = 10

Answer 1

Respuesta:

 [1]    y = -4x + 10

// Plug this in for variable  y  in equation [2]

  [2]    3x - 2•(-4x+10) = 13

  [2]    11x = 33

// Solve equation [2] for the variable  x  

  [2]    11x = 33  

  [2]    x = 3  

// By now we know this much :

   x = 3

   y = -4x+10

// Use the  x  value to solve for  y  

   y = -4(3)+10 = -2  

Solution :

{x,y} = {3,-2}

Explicación paso a paso: