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UKMT Junior Mathematical Challenge, 2018

Algebra Difficulty 1.0 Junior Find the answer United Kingdom

Billy has three times as many llamas as lambs. Milly has twice as many lambs as llamas. They have 17 animals in total. How many of the animals are llamas?

(A) $5$ (B) $6$ (C) $7$ (D) $8$ (E) $9$

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