Wednesday 15 April 2015

INEQUALITIES 6




If │4x – 7 │= 21; Find  x

Solution

±(4x – 7 )= 41

4x -7= 41    OR   –(4x-7) = 41

4x – 7 = 41    OR   -4x+7= 41

4x = 41 + 7    OR   -4x= 41-7

4x = 48     OR   -4x  =  34
4      4                 4        4

x = 12  OR  x = 17/2


Hence x = 12 OR x = 17/2     


TRY THIS...............................

If │2x – 6 │= 24; Find  x

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