The sum of twice a number and half the number is 10.?

Answer 1

2 n + n/2 = 10 ... 2.5 n = 10

Answer 2

n/2 + 2 n = 10
n + 4 n = 20
5 n = 20
n = 4
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Check
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8 + 2 = 10 , sure enough