8x+y=29;8x+4y=20

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for example:
2x+y=8
x+3y=14

Solution for 8x+y=29;8x+4y=20 system of equations:


  • /| 8*x+y-29 = 0| 8*x+4*y-20 = 0
  • We try to solve the equation: 8*x+y-29 = 0
  • 8*x+y-29 = 0 / - 8*x-29
  • y = -(8*x-29)
  • y = 29-(8*x)
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 4*(29-(8*x))+8*x-20 = 0| y = 29-(8*x)
  • 4*(29-8*x)+8*x-20 = 0
  • 116-24*x-20 = 0
  • 96-24*x = 0
  • 96-24*x = 0 / - 96
  • -24*x = -96 / : -24
  • x = -96/(-24)
  • x = 4
  • We insert the solution into one of the initial equations of our system of equations
  • For y = 29-(8*x):
  • y = 29-(4*8)
  • y = 29-32
  • y = -3
  • We get a system of equations:
  • /| y = -3| x = 4

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