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23-11-2016
Mathematics

contestada

Which ordered pair is the solution to the system?

{x+3y=6
{4x+6y=−6

(−9, 5)
(−3, 3)
(12, −2)
(6, 3)

Respuesta :

23-11-2016

x=6-3y
4(6-3y)+6y=-6
24-12y+6y=-6
24-6y=-6
-6y=-30
y=30/6
y=5

x+3 (5)=6
x+15=6
x=-9. (-9,5) <------------

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