theshadoweeveeog
theshadoweeveeog theshadoweeveeog
  • 04-03-2020
  • Mathematics
contestada

I'm really confused about this question about Solving Systems by Elimination

x-y=8
x+y=12

Respuesta :

angelinahamza94
angelinahamza94 angelinahamza94
  • 04-03-2020

Answer:

x=10

y=2

Step-by-step explanation:

1)add the equations and find what x is.

x-y=8

+x+y=12

—————

2x=20

— —

2 2

x=10

3)fill in x for the second equation.

x+y=12

since x=10,replace x with 10.

10+y=12.

subtract 19 from both sides.

10+y=12

-10 -10

—————-

y=2

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