marielasilva22654 marielasilva22654
  • 20-07-2020
  • Mathematics
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help on system of equations using substitution

help on system of equations using substitution class=

Respuesta :

Stephen46
Stephen46 Stephen46
  • 20-07-2020

Answer:

The answer is option C.

The answer is option

Step-by-step explanation:

5x + 2y = - 15 ......... 1

x - 4y = - 3 ........ 2

Make x the subject in the second equation and substitute it into the first equation

That's

x = 4y - 3

5(4y - 3) + 2y = - 15

20y - 15 + 2y = - 15

22y = - 15 + 15

22y = 0

Divide both sides by 22

y = 0

Substitute y = 0 into x = 4y - 3

That's

x = 4(0) - 3

x = - 3

x = - 3 y = 0

( - 3 , 0)

Hope this helps you

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