Question

X-y = -10 2x+4y=22 substitution

Answer 1

Answer:

[1]    x - 4y = 22

  [2]    2x + 5y = -21

Step-by-step explanation:

Solve equation [1] for the variable  x  

 

 [1]    x = 4y + 22

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

  [2]    2•(4y+22) + 5y = -21

  [2]    13y = -65

// Solve equation [2] for the variable  y  

  [2]    13y = - 65  

  [2]    y = - 5  

// By now we know this much :

   x = 4y+22

   y = -5

// Use the  y  value to solve for  x  

   x = 4(-5)+22 = 2

I am sorry if I get it wrong.