Sum
If 25 – 4x ≤ 16, find:
(1) the smallest value of x, when x is a real number,
(2) the smallest value of x, when x is an integer.
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Solution
25 – 4x ≤ 16
-4x ≤ 16 – 25
-4x ≤ -9
`"x" ≥ 9/4`
x ≥ 2.25
(1) The smallest value of x, when x is a real number, is 2.25.
(2) The smallest value of x, when x is an integer, is 3.
Concept: Linear Inequations in One Variable
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