zurielkim69 zurielkim69
  • 15-06-2022
  • Mathematics
contestada

x − y = 12
x + 2y = 21

Respuesta :

Medunno13
Medunno13 Medunno13
  • 26-06-2022

Answer: x=15, y=3

Step-by-step explanation:

Subtracting the two equations, we get -3y=-9, meaning y=3.

Substituting this into the first equation, we get that x-3=12, and thus, x=15.

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