If 11x + 7 ≥ 16 + 7x ≥ 15x – 12; find x.
Solution
11x + 7 ≥ 16 + 7x and 16 + 7x ≥ 15x – 12
11x – 7x ≤ 16 - 7 and 15
+12 ≤ 15x - 7x
4x ≤ 9 and 27 ≤ 8x
4x ≤ 9 and 27
≤ 8x
4 4 8 8
x ≤ 9/4 and 27/8 ≤ x
x ≤ 9/4 and x ≥ 27/8
TRY THIS………………….
If 11y + 7 ≥ 16 + 7y ≥ 15y – 17; find y.
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