Question

algebra please solve it

Answer 1

Answer:

HOPE ITS CLEAR

Step-by-step explanation:

// Solve equation [3] for the variable  y  

 

 [3]    y = 6x + 7z - 12

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

  [1]    2x + 5•(6x+7z-12) + 2z = -38

  [1]    32x + 37z = 22

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

  [2]    3x - 2•(6x+7z-12) + 4z = 17

  [2]    -9x - 10z = -7

// Solve equation [1] for the variable  z  

 

 [1]    37z = -32x + 22

 [1]    z = -32x/37 + 22/37

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

  [2]    -9x - 10•(-32x/37+22/37) = -7

  [2]    -13x/37 = -39/37

  [2]    -13x = -39

// Solve equation [2] for the variable  x  

  [2]    13x = 39  

  [2]    x = 3  

// By now we know this much :

   x = 3

   y = 6x+7z-12

   z = -32x/37+22/37

// Use the  x  value to solve for  z  

   z = -(32/37)(3)+22/37 = -2  

// Use the  x  and  z  values to solve for  y  

 y = 6(3)+7(-2)-12 = -8