Question

3x-4y=8,3x-4y=10
$3x - 4y = 8 \\ 3x - 4y = 10$

Answer 1

Solve equation [1] for the variable  x  

 

 [1]    x = -2y + 8

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

  [2]    3•(-2y+8) - 4y = 10

  [2]     - 10y = -14

// Solve equation [2] for the variable  y  

  [2]    10y = 14  

  [2]    y = 7/5  

// By now we know this much :

   x = -2y+8

   y = 7/5

// Use the  y  value to solve for  x  

   x = -2(7/5)+8 = 26/5  

Solution :

{x,y} = {26/5,7/5}  

  Processing ends successfully