INEQUALITIES 1

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.