Question

6x+7y= 10 3x+ 7y= 12​

Answer 1

Answer:

Step-by-step explanation:

System of Linear Equations entered :

  [1]    6x - 7y = 10

  [2]    3x + 7y = -8

Solve by Substitution :

// Solve equation [2] for the variable  y  

 

 [2]    7y = -3x - 8

 [2]    y = -3x/7 - 8/7

// Plug this in for variable  y  in equation [1]

  [1]    6x - 7•(-3x/7-8/7) = 10

  [1]    9x = 2

// Solve equation [1] for the variable  x  

  [1]    9x = 2  

  [1]    x = 2/9  

// By now we know this much :

   x = 2/9

   y = -3x/7-8/7

// Use the  x  value to solve for  y  

   y = -(3/7)(2/9)-8/7 = -26/21  

Solution :

{x,y} = {2/9,-26/21}