sarialyzcolon14 sarialyzcolon14
  • 21-01-2021
  • Mathematics
contestada

Need help with this please answer :( I’m not good at math at all
5x + 4y = -7
-5x - 2y = 1

Need help with this please answer Im not good at math at all 5x 4y 7 5x 2y 1 class=

Respuesta :

786winkoaung
786winkoaung 786winkoaung
  • 21-01-2021

Answer:

y=-3

x=1

(1,-3)

Step-by-step explanation:

5x+4y=-7

-5x-2y=1

Cancel +5x - 5

     2y=-6

      y=-3

5x-12=-7   or    -5x+6=1

5x=5                -5x=-5

x=1                     x=1

Answer Link
ImagineCloud
ImagineCloud ImagineCloud
  • 21-01-2021

Answer:

y = -3, x = 1

or

(1, -3)

Step-by-step explanation:

5x + 4y = -7

-5x - 2y = 1

add the two equations together

0x + 2y = -6

2y = -6

2y/2 = -6/2

y = -6/2

y = -3

now substitute y = -3 into either of the equations

5x + 4y = -7

5x + 4(-3) = -7

5x - 12 = -7

5x = -7 + 12

5x = 5

x = 1

Answer Link

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