TRUEBOSS72
TRUEBOSS72
12-03-2018
Mathematics
contestada
Please help me on this....
Respuesta :
choixongdong
choixongdong
12-03-2018
8x + 4y = 16
x + 7y = 15
multiply second equation by (-8)
-8x - 56y = -120
so now
8x + 4y = 16
-8x - 56y = -120
-----------------add
-52y = -104
y = 2
7(2) = 15 - x
14 = 15 - x
x = 1
answer is C.
(1, 2)
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