Find x if 5x – 21 ≤ x + 15 ≤ 6x.
Solution
5x – 21 ≤ x + 15 and x + 15 ≤ 6x
5x – x ≤ 21+ 15 and 15 ≤ 6x - x
4x ≤ 36 (divide by 4 both sides) and
15 ≤
5x (divide by 5 both sides)
x ≤ 9 and 3 ≤ x
x
≤ 9
and x ≥ 3 answer
TRY THIS……..
Find x if 6x – 35 ≤ x + 15 ≤ 2x.
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