BaiC4ibscarrer BaiC4ibscarrer

24-11-2016
Mathematics

contestada

PLEASE HELP? SERIOUSLY? :)

Solve 2x + 5y = -133x - 4y = -8

(4, 1)

(-4, 1)

(4, -1)

(-4, -1)

Respuesta :

nobillionaireNobley nobillionaireNobley

25-11-2016

2x + 5y = -8 . . . (1)
-133x - 4y = -8 . . . (2)

(1) * 4 => 8x + 20y = -32 . . . (3)
(2) * -5 => -665x + 20y = 32 . . . (4)

(3) - (4) => 673x = 0
x = 0
From (1), 2(0) + 5y = -8
5y = -8
y = -8/5

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