2x-y=-5;4x+y=2

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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-y=-5;4x+y=2 system of equations: 


  • /| 2*x-y+5 = 0| 4*x+y-2 = 0
  • We try to solve the equation: 2*x-y+5 = 0
  • 2*x-y+5 = 0 // - 2*x+5
  • -y = -(2*x+5) // * -1
  • y = 2*x+5
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 4*x+2*x-2+5 = 0| y = 2*x+5
  • 6*x+3 = 0 // - 3
  • 6*x = -3 // : 6
  • x = -3/6
  • x = -1/2
  • We insert the solution into one of the initial equations of our system of equations
  • For y = 2*x+5: 
  • y = 5-1/2*2
  • y = 5-1
  • y = 4
  • We get a system of equations:
  • /| y = 4| x = -1/2

 

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