amcalma787 amcalma787

21-07-2020
Mathematics

contestada

Solve the equations. 8x + 7y = 39 4x – 14y = –68

Respuesta :

vdveeniris vdveeniris

22-07-2020

Answer:

y = 5, x= 1/2

Step-by-step explanation:

8x+7y = 39

4x - 14y = -68

x = 39/8 - 7/8y

4(39/8 - 7/8y) -14y = -68

19.5 - 3.5y -14y = -68

-17.5y = -87.5

y = 5

x = 39/8 - 7/8(5)

x = 0.5 or 1/2

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