nickacarriker
nickacarriker nickacarriker
  • 18-07-2019
  • Mathematics
contestada

Solve the system using elimination.

x- y = -5
3x + y = 1

A (-1, 4)
B (-3, 4)
C (-1, 2)
D (2, -2)​

Respuesta :

wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 19-07-2019

Answer:

A (-1, 4)

Step-by-step explanation:

x- y = -5

3x + y = 1

Add the two equations together to eliminate y

x- y = -5

3x + y = 1

-------------------

4x = -4

Divide by 4

4x/4 = -4/4

x = -1

Now substitute x=-1 into the first equation

-1 -y = -5

Add 1 to each side

-1+1 -y = -5+1

-y = -4

Multiply by -1

y = 4

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