nataliebyrd
nataliebyrd nataliebyrd
  • 23-05-2023
  • Mathematics
contestada

Solve by using multiplication with the addition-or-subtraction method.

4x - 5y = 0
8x + 5y = -6

Respuesta :

phuchoang
phuchoang phuchoang
  • 23-05-2023

Answer:

x = -0.25

y = -0.5

Step-by-step explanation:

4x - 5y = 0

8x + 5y = -6

We multiply the first equation by -2

-8x + 10y = 0

8x + 5y = -6

15y = -6

y = -6/15 = -2/5 = -0.4

Now we put -0.4 in for y and solve for x

8x + 5(-0.4) = -6

-8x - 2 = -6

-8x = -4

x = -1/2 = -0.5

Let's Check the answer.

4(-0.5) - 5(-0.4) = 0

-2 + 2 = 0

0 = 0

So, x = -0.5 and y = -0.4 is the correct answer.

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