⅓x +¼x = 49 , x = ?

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• A 56
• B 72
• C 84
• D 63

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Answer: C. 84

Use the LCM 12: 1/3 x + 1/4 x = 4/12 x + 3/12 x = 7/12 x. So 7/12 x = 49, giving x = 49 x 12 / 7 = 7 x 12 = 84.

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