If 10x + 4 ≥ 7 + 3x ≥ 9x – 10; find x
Solution
10x + 4 ≥ 7 + 3x and 7 + 3x ≥ 9x - 10
10x – 3x ≤ 7 - 4 and 7 +10 ≤ 9x - 3x
7x ≤ 3 and 17 ≤ 6x
7x ≤ 3 and 17
≤ 6x
7 7 6 6
x ≤ 3/7 and 17/6 ≤ x
x ≤ 3/7 and x
≥ 17/6
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