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Question
If the replacement set is the set of real numbers, solve:
`5 + x/4 > x/5 + 9`
Solution
`5 + x/4 > x/5 + 9`
`x/4 - x/5 > 9 - 5`
`x/20 > 4`
x > 80
Since the replacement set of real numbers.
∴ Solution set = {x : x ∈ R and x > 80}
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