Question

a + 5
$a + 3 \frac{1}{2} = 5$
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Answer 1

$a + 3 \frac{1}{2} = 5 \\ a = 5 - 3 \frac{1}{2} = 1 \frac{1}{2} \\a + 5 = 1 \frac{1}{2} + 5 \\ = 6 \frac{1}{2}$