puddinpopz
puddinpopz puddinpopz
  • 08-10-2020
  • Mathematics
contestada

3x = 27 + Зу
3х - 10у = 27

please explain how you got the answer.

Respuesta :

madison2014nc
madison2014nc madison2014nc
  • 09-10-2020

Answer:

Hi there!

Your answer is:

Y= 0

X= 9

Step-by-step explanation:

3x=27+3y

3x-10y=27

Solve one of them for Y

I chose the first equation

3x=27+3y

-27

3x-27=3y

/3

x-9 = y

NOW, plug y in the second equation!

3x-10y=27

y= x-9

3x-10y=27

3x-10(x-9) = 27

Solve for x!

3x-10x+90 = 27

-7x + 90 =27

-90

-7x = -63

/-7

x= 9

FINALLY, plug back in x for y equation

y=x-9

x=9

y=9-9

y=0

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