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2 years ago

X − y = 12 x + 2y = 21

Mathematics

1 answer:

olga55 [171]2 years ago

5 0

Answer: x=15, y=3

Step-by-step explanation:

Subtracting the two equations, we get -3y=-9, meaning y=3.

Substituting this into the first equation, we get that x-3=12, and thus, x=15.

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Step-by-step explanation:

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