8x-y=66;7x-4y=48

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Solution for 8x-y=66;7x-4y=48 system of equations: 


  • /| 8*x-y-66 = 0| 7*x-(4*y)-48 = 0
  • We try to solve the equation: 8*x-y-66 = 0
  • 8*x-y-66 = 0 // - 8*x-66
  • -y = -(8*x-66) // * -1
  • y = 8*x-66
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 7*x-(4*(8*x-66))-48 = 0| y = 8*x-66
  • 7*x-1*4*(8*x-66)-48 = 0
  • 264-25*x-48 = 0
  • 216-25*x = 0
  • 216-25*x = 0 // - 216
  • -25*x = -216 // : -25
  • x = -216/(-25)
  • x = 216/25
  • We insert the solution into one of the initial equations of our system of equations
  • For y = 8*x-66: 
  • y = 8*216/25-66
  • y = 1728/25-66
  • y = 78/25
  • We get a system of equations:
  • /| y = 78/25| x = 216/25

 

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