y=x+7;y=-x-1

Simple and best practice solution for y=x+7;y=-x-1. Check how easy it is, to solve this system of equations and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

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

Solution for y=x+7;y=-x-1 system of equations: 


  • /| y-x-7 = 0| x+y+1 = 0
  • We try to solve the equation: y-x-7 = 0
  • y-x-7 = 0 // + -x-7
  • y = -(-x-7)
  • y = x+7
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| x+x+1+7 = 0| y = x+7
  • 2*x+8 = 0 // - 8
  • 2*x = -8 // : 2
  • x = -8/2
  • x = -4
  • We insert the solution into one of the initial equations of our system of equations
  • For y = x+7: 
  • y = 7-4
  • y = 3
  • We get a system of equations:
  • /| y = 3| x = -4

 

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