28x+7y=-21;y=-4x-3

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2x+y=8
x+3y=14

Solution for 28x+7y=-21;y=-4x-3 system of equations: 


  • /| 28*x+7*y+21 = 0| y-(-4*x)+3 = 0
  • We try to solve the equation: 28*x+7*y+21 = 0
  • 28*x+7*y+21 = 0 // - 28*x+21
  • 7*y = -(28*x+21) // : 7
  • y = (-(28*x+21))/7
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| (-(28*x+21))/7-(-4*x)+3 = 0| y = (-(28*x+21))/7
  • (-28*x-21)/7+4*x+3 = 0
  • 3-3 = 0
  • 0 = 0
  • The system of equations has infinitely many solutions

 

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