davidh90901 davidh90901

15-10-2018
Mathematics

contestada

X-7y=53 -4x-5y=19 solve for x and y

Respuesta :

yellowyarn2003 yellowyarn2003

19-10-2018

Answer:

y = -7; x = 4

Step-by-step explanation:

x - 7y = 53

x = 7y + 53

-4x - 5y = 19

-4(7y + 53) - 5y = 19

-28y - 212 - 5y = 19

-33y = 231

-11y = 77

y = -7

x - 7(-7) = 53

x + 49 = 53

x = 4

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