2x+y=15;x+y=8

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

Solution for 2x+y=15;x+y=8 system of equations: 


  • /| 2*x+y-15 = 0| x+y-8 = 0
  • We try to solve the equation: 2*x+y-15 = 0
  • 2*x+y-15 = 0 // - 2*x-15
  • y = -(2*x-15)
  • y = 15-(2*x)
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| x-(2*x)-8+15 = 0| y = 15-(2*x)
  • 7-x = 0 // - 7
  • -x = -7 // * -1
  • x = 7
  • We insert the solution into one of the initial equations of our system of equations
  • For y = 15-(2*x): 
  • y = 15-(2*7)
  • y = 15-14
  • y = 1
  • We get a system of equations:
  • /| y = 1| x = 7

 

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