Question

Solve y=4x-1; y=3x+6 by substitution brainly

Answer 1

• Solve equation for the variable  y  

   [2]    y = 3x + 6

•  Plug this in for variable  y  in equation

   [1]    (3x+6) - 4x = -1

  [1]     - x = -7

• Solve equation for the variable  x  

    [1]    x = 7  

• By now we know this much :

     y = 3x+6

    x= 7

• Use the  x  value to solve for  y  

    y = 3(7)+6 = 27  

• Solution :

  {y,x} = {27,7}  

Hope this helps!

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