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20-01-2017
Mathematics

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x + y = -2 2x – 3y = -9

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karmellmoctezuma karmellmoctezuma

20-01-2017

x + y = -2
-x -x
y= -2 -x

2x -3y = -9
2x -3(-2 -x) = -9
2x +6 +3x = -9
-6 -6
5x = -15
5x/5 = -15/5
x= -3

y= -2 -x
y= -2 -(-3)
y= -2 +3
y= 1

the answer: (-3,1)

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