2x+7y=-7;-4x-3y=-19

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Remember to put linear equations with variables x and y.
for example:
2x+y=8
x+3y=14

Solution for 2x+7y=-7;-4x-3y=-19 system of equations: 


  • /| 2*x+7*y+7 = 0| 19-4*x-(3*y) = 0
  • We try to solve the equation: 2*x+7*y+7 = 0
  • 2*x+7*y+7 = 0 // - 2*x+7
  • 7*y = -(2*x+7) // : 7
  • y = (-(2*x+7))/7
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 19-(3*((-(2*x+7))/7))-4*x = 0| y = (-(2*x+7))/7
  • (-1*3*(-2*x-7))/7-4*x+19 = 0
  • 3-22/7*x+19 = 0
  • 22-22/7*x = 0
  • 22-22/7*x = 0 // - 22
  • -22/7*x = -22 // : -22/7
  • x = -22/(-22/7)
  • x = 7
  • We insert the solution into one of the initial equations of our system of equations
  • For y = (-(2*x+7))/7: 
  • y = (-(2*7+7))/7
  • y = (-(7+14))/7
  • y = -21/7
  • y = -3
  • We get a system of equations:
  • /| y = -3| x = 7

 

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