p+q=7;7p-q=25

Simple and best practice solution for p+q=7;7p-q=25. 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 p+q=7;7p-q=25 system of equations: 


  • /| p+q-7 = 0| 7*p-q-25 = 0
  • We try to solve the equation: p+q-7 = 0
  • p+q-7 = 0 // - p-7
  • q = -(p-7)
  • q = 7-p
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 7*p+p-25-7 = 0| q = 7-p
  • 8*p-32 = 0 // + 32
  • 8*p = 32 // : 8
  • p = 32/8
  • p = 4
  • We insert the solution into one of the initial equations of our system of equations
  • For q = 7-p: 
  • q = 7-4
  • q = 3
  • We get a system of equations:
  • /| q = 3| p = 4

 

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