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Answer:
12 19/42
Step-by-step explanation:
= (8 + 4) + (1/6 + 2/7) =
12 + 1 × 7/6 × 7 + 2 × 6/7 × 6 =
12 + 7/42 + 12/42 =
12 + 7 + 12/42 =
12 + 19/42 =
12 19/42