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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