x=y+7;4y=x+2

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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+7;4y=x+2 system of equations: 


  • /| x-y-7 = 0| 4*y-x-2 = 0
  • We try to solve the equation: x-y-7 = 0
  • x-y-7 = 0 // - x-7
  • -y = -(x-7) // * -1
  • y = x-7
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 4*(x-7)-x-2 = 0| y = x-7
  • 4*(x-7)-x-2 = 0
  • 3*x-28-2 = 0
  • 3*x-30 = 0
  • 3*x-30 = 0 // + 30
  • 3*x = 30 // : 3
  • x = 30/3
  • x = 10
  • We insert the solution into one of the initial equations of our system of equations
  • For y = x-7: 
  • y = 10-7
  • y = 3
  • We get a system of equations:
  • /| y = 3| x = 10

 

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