annazimmermana1 annazimmermana1
  • 24-08-2017
  • Mathematics
contestada

3x - y = 9
2x + y = 6
what is the solution to this using the addition method

Respuesta :

SeaLemon
SeaLemon SeaLemon
  • 24-08-2017
Add the y so they cancel out and leave you with: 5x=15

Divide the 5: x=3

Plug in the value x in any of the two equations and solve to get the value of y
(I'm picking the first one just cause)
3(3) - y = 8
Multiply: 9 -y = 9
Solve: y = 0

Answer: (3,0)
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