x*y=855;45*y=855

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

Solution for x*y=855;45*y=855 system of equations: 


  • /| x*y-855 = 0| 45*y-855 = 0
  • We try to solve the equation: x*y-855 = 0
  • x*y-855 = 0 // + 855
  • x*y = 855 // : x
  • y = 855/x
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 45*(855/x)-855 = 0| y = 855/x
  • 38475*x^-1 = 855 // : 38475
  • x^-1 = 1/45
  • -1 < 0
  • 1/(x^1) = 1/45 // * x^1
  • 1 = 1/45*x^1 // : 1/45
  • 45 = x^1
  • x = 45
  • We insert the solution into one of the initial equations of our system of equations
  • For y = 855/x: 
  • y = 855/45
  • y = 19
  • We get a system of equations:
  • /| y = 19| x = 45

 

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