Thursday, 13 March 2014

INEQUALITIES C7



2x – 1 ≤ x + 5 ≤ 11x

solution 

2x – 1 ≤ x + 5 and  x + 5 ≤ 11x

2x – x ≤ 1+ 5 and  5 ≤ 11x - x

x ≤ 6 and  5 ≤ 10x (divide by5 both sides)

x ≤ 6 and  1/2 ≤ x 

x ≤ 6 and  x ≥ 1/2 answer

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