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Nadusha1986 [10]
2 years ago
8

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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