Answer: f < 9
Explanation:
first, cross multiply 2 and 2:
f - 5 < 4
f < 9
Answer:
=> (f-5)/2 < 2
multiplying both sides by 2
=> 2(f-5)/2 < 2×2
=> f-5 < 4
adding 5 to both sides
=> f-5+5 < 4+5
=> f < 9
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