Monday, 9 August 2021

INEQUALITIES

 

If 4x + 8 ≥ 7 + 3x ≥ 9x – 10; find x.

 

Solution

 

4x + 8 ≥ 7 + 3x and  7 + 3x ≥ 9x - 10

 

4x – 3x ≤ 7 - 8 and  7 +10 ≤ 9x - 3x

 

x ≤ -1 and  17 ≤ 6x

 

x ≤ 1  and  17 ≤ 6x

                    6      6

 

x ≤ 1 and  17/6 ≤ x

 

x ≤ 1 and  x  ≥ 17/6

 

TRY THIS…………….

 

 If 12x + 18 ≥ 7 + 3x ≥ 9x – 29; find x


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