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Question
If the replacement set is the set of real numbers, solve:
8 – 3x ≤ 20
Solution
8 – 3x ≤ 20
– 3x ≤ 20 – 8
– 3x ≤ 12
3x ≥ – 12
`x ≥ (-12)/3`
x ≥ – 4
Since the replacement set of real numbers.
∴ Solution set = {x : x ∈ R and x ≥ – 4}
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