x+y=220;2x+4y=520

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

Solution for x+y=220;2x+4y=520 system of equations:


  • /| x+y-220 = 0| 2*x+4*y-520 = 0
  • We try to solve the equation: x+y-220 = 0
  • x+y-220 = 0 / - x-220
  • y = -(x-220)
  • y = 220-x
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 4*(220-x)+2*x-520 = 0| y = 220-x
  • 4*(220-x)+2*x-520 = 0
  • 880-2*x-520 = 0
  • 360-2*x = 0
  • 360-2*x = 0 / - 360
  • -2*x = -360 / : -2
  • x = -360/(-2)
  • x = 180
  • We insert the solution into one of the initial equations of our system of equations
  • For y = 220-x:
  • y = 220-180
  • y = 40
  • We get a system of equations:
  • /| y = 40| x = 180

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