-7x-3y=-25;-6x-4y=-20

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Solution for -7x-3y=-25;-6x-4y=-20 system of equations: 


  • /| 25-7*x-(3*y) = 0| 20-6*x-(4*y) = 0
  • We try to solve the equation: 25-7*x-(3*y) = 0
  • 25-7*x-3*y = 0 // - 25-7*x
  • -3*y = -(25-7*x) // : -3
  • y = (-(25-7*x))/(-3)
  • y = (25-7*x)/3
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 20-(4*((25-7*x)/3))-6*x = 0| y = (25-7*x)/3
  • (-1*4*(25-7*x))/3-6*x+20 = 0
  • 10/3*x-100/3+20 = 0
  • 10/3*x-40/3 = 0
  • 10/3*x-40/3 = 0 // + 40/3
  • 10/3*x = 40/3 // : 10/3
  • x = 40/3/10/3
  • x = 4
  • We insert the solution into one of the initial equations of our system of equations
  • For y = (25-7*x)/3: 
  • y = (25-7*4)/3
  • y = (25-28)/3
  • y = -3/3
  • y = -1
  • We get a system of equations:
  • /| y = -1| x = 4

 

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