ilovecandy1 ilovecandy1

16-01-2017
Mathematics

contestada

Solve using elimination

-8x - 7y = 7
-9x - 7y = 14

Respuesta :

narwhalslippers narwhalslippers

16-01-2017

x=-7 is what I got :/.

Answer Link

doodle10 doodle10

16-01-2017

-9x - (-8x-7) = 14
-9x +8x +7 = 14
-x + 7 = 14
7 = 14 + x
X = - 7

(-8 x - 7) - 7y = 7
56 - 7y = 7
56-7 = 7y
49 = 7y
7 = y

Answer x=-7 and y=7

Answer Link

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