-7x+14y=28;-7x+11y=-5

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

Solution for -7x+14y=28;-7x+11y=-5 system of equations: 


  • /| 14*y-7*x-28 = 0| 11*y-7*x+5 = 0
  • We try to solve the equation: 14*y-7*x-28 = 0
  • 14*y-7*x-28 = 0 // + -7*x-28
  • 14*y = -(-7*x-28) // : 14
  • y = (-(-7*x-28))/14
  • y = (28-(-7*x))/14
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 11*((28-(-7*x))/14)-7*x+5 = 0| y = (28-(-7*x))/14
  • (11*(7*x+28))/14-7*x+5 = 0
  • 5-3/2*x+22 = 0
  • 27-3/2*x = 0
  • 27-3/2*x = 0 // - 27
  • -3/2*x = -27 // : -3/2
  • x = -27/(-3/2)
  • x = 18
  • We insert the solution into one of the initial equations of our system of equations
  • For y = (28-(-7*x))/14: 
  • y = (28-(-7*18))/14
  • y = (28+126)/14
  • y = 154/14
  • y = 11
  • We get a system of equations:
  • /| y = 11| x = 18

 

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