tylerholton1234 tylerholton1234
  • 10-11-2019
  • Mathematics
contestada

-3x+5y=-9 and 4x+8y=12

Respuesta :

finleyquinnflanagan finleyquinnflanagan
  • 10-11-2019

-3x + 5y = -9

4x + 8y = 12

Simplify the second,

x + 2y = 3

Times three,

3x + 6y = 9

Add to the first equation,

11y = 0

y = 0

-3x + 5(0) = -9

x = 3

Answer: x=3, y=0

Answer Link
ghanami
ghanami ghanami
  • 10-11-2019

Answer:

Step-by-step explanation:

the system is : -3x+5y=-9 ......(1)

                         4x+8y=12......(2)

divid by 4  in (2) :  x +2y = 3.......    x = 3 -2y

put the value for x in (1) :  - 3(3-2y) +5y = -9

-9+6y +5y =- 9

11y=18  so   y=0      x = 3-2(0) = 3

Answer Link

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