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

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


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

 

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