If 11x + 4 ≥ 15 + 3x ≥ 5x – 10; find x.
Solution
11x + 4 ≥ 15 + 3x and 15 + 3x ≥ 5x – 10
11x – 3x ≤ 15 - 4 and 15
+10 ≤ 5x - 3x
8x ≤ 11 and 25 ≤ 2x
8x ≤ 11 and 25
≤ 2x
8 8 2 2
x ≤ 11/8 and 25/2 ≤ x
x ≤ 11/8 and x ≥ 25/2
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