twyatt831 twyatt831
  • 31-10-2019
  • Mathematics
contestada

3x+y=4
x+2y=-2
what is the answer

Respuesta :

mkarikari1850
mkarikari1850 mkarikari1850
  • 31-10-2019

Answer:

2(3x+y=4)

1(x+2y=-2)

6x+2y=8

(-) x+2y=-2

5x=10

5

x=2

x+2y=-1

2+2y=-1

-2 -2

2y=-3

2

y=-3/2

Step-by-step explanation:

  1. multiply the first equation by 2 to make y equal to each other.
  2. subtract to eliminate y
  3. divide by 5 to get x
  4. take one of the equations
  5. replace x by 2 to solve for y
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