Ibarrakarla
Ibarrakarla
11-02-2017
Mathematics
contestada
3x-y=16
2x-y=12
substitution method
Respuesta :
apologiabiology
apologiabiology
11-02-2017
multiply 2nd equation by -1 and add to first one
3x-y=16
-2x+y=-12 +
1x+0y=4
x=4
sub back
2x-y=12
2(4)-y=12
8-y=12
minus 8 both sides
-y=4
times -1
y=-4
(x,y)
(4,-4)
Answer Link
friedalafiesta
friedalafiesta
11-02-2017
The answer should be (4, -4)
Answer Link
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