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expeople1 [14]
3 years ago
12

-4x+y=6 and -5x-y=21

Mathematics
1 answer:
Dovator [93]3 years ago
8 0

Answer:(-3,-6)


Step-by-step explanation:

-4x+y=6

+ -5x-y=21

_________

-9x. = 27


X= 27/-9

X = -3


-4(-3)+y=6

12+y=6

Y=6-12

Y= -6


To check

-4(-3)+(-6)=6 and -5(-3)-(-6)=21

12-6=6. 15+6=21

6=6. 21=21


They check by our answers

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