daysyperez2003 daysyperez2003

10-07-2020
Mathematics

contestada

Solve the system of equations using substitution.
3x + 7y = 19
-X + 8y = -27

Respuesta :

mcovey2016 mcovey2016

10-07-2020

Answer:

x= 11

y= -2

Step-by-step explanation:

8y + 27 =x

3(8y+27) + 7y =19

24y + 81 + 7y =19

31y + 81 =19

-81 -81

31y = -62

31 31

y = -2

-x + 8(-2) = -27

-x - 16 = -27

+16 +16

-x = -11

x= 11

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