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nikdorinn [45]
3 years ago
8

-x-8y=-18 x +9y=21 A) (-6,3) B) (6, -3) c) (6,9) D) (6,3)

Mathematics
1 answer:
gavmur [86]3 years ago
7 0

Answer:

A) (-6,3)

Step-by-step explanation:

-x-8y=-18

x +9y=21

Add the two equations together to eliminate x

-x-8y=-18

x +9y=21

-------------------

y = 3

Now we need to find x

x +9y = 21

Substitute in y

x +9(3)  =21

x+27 = 21

Subtract 27 from each side

x+27-27 = 21-27

x = -6

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