x+8y=28;2x+5y=12

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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+8y=28;2x+5y=12 system of equations:


  • /| x+8*y-28 = 0| 2*x+5*y-12 = 0
  • We try to solve the equation: x+8*y-28 = 0
  • x+8*y-28 = 0 / - x-28
  • 8*y = -(x-28) / : 8
  • y = (-(x-28))/8
  • y = (28-x)/8
  • We insert the solution into one of the initial equations of our system of equations
  • We get a system of equations:
  • /| 5*((28-x)/8)+2*x-12 = 0| y = (28-x)/8
  • (5*(28-x))/8+2*x-12 = 0
  • 11/8*x-12+35/2 = 0
  • 11/8*x+11/2 = 0
  • 11/8*x+11/2 = 0 / - 11/2
  • 11/8*x = -11/2 / : 11/8
  • x = -11/2/11/8
  • x = -4
  • We insert the solution into one of the initial equations of our system of equations
  • For y = (28-x)/8:
  • y = (4+28)/8
  • y = 32/8
  • y = 4
  • We get a system of equations:
  • /| y = 4| x = -4

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