belindaqueen
belindaqueen belindaqueen
  • 22-05-2020
  • Mathematics
contestada

.Solve the system of equations. Use elimination
x + 2y = -3
x - y = -12
a) (-9,3)
b) (-7,5)
c) (9, 6)
d) (3, 15)​

Respuesta :

SvetkaChem
SvetkaChem SvetkaChem
  • 22-05-2020

Answer:

a) (-9,3)

Step-by-step explanation:

   x + 2y = -3

- (x -    y = -12)

x + 2y = -3

- x + y =  12

       3y =  9

          y = 3

x - y = -12

x- 3 = -12

x= - 9

(-9, 3)

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