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3 years ago

Solve by substitution -4x+y=6 -5x-y=21

Mathematics

1 answer:

inn [45]3 years ago

7 0

Answer:

x=-3, y=-6. (-3, -6).

Step-by-step explanation:

-4x+y=6

-5x-y=21

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

-9x=27

x=27/-9

x=-3

-5(-3)-y=21

15-y=21

y=15-21

y=-6

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