Tjgg
Tjgg
02-11-2016
Mathematics
contestada
-x+2y=9
-7x-2y=-1
Solve each system by elimination
Respuesta :
Azieq
Azieq
03-11-2016
x - 2y = - 9
7x + 2y = 1
x - 2y = - 9
(+)
7x + 2y = 1
___________
8x = - 8
x = - 1
- 1 - 2y = - 9
2y = 8
y = 4
i am a mathematics teacher. if anything to ask please pm me
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