Question
2/5 of a number plus 3/10 of the same number is 70. Find
the number.Solution
(2/5)N + (3/10)N = 70 LCM of 5 and 10 is 10 2/5 = 4/10 So, (4/10)N + (3/10)N = (7/10)N (7/10)N = 70 N = 70 × (10/7) = 10 × 10 = 100 Answer: 100
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