Saturday 25 April 2015

INEQUALITIES 9




If │2x – 7 │= 35; Find  x

Solution

±(2x – 7 )= 35

2x -7= 35    OR   –(2x-7) = 35

2x – 7 = 35   OR   -2x+7= 35

2x = 35 + 7    OR   -2x= 35-7

2x = 42     OR   -2x  =  28
2      2                 2        2

x = 21  OR  x = 14


Hence x = 21 OR x = 14     


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

If │4x - 16 │= 36; Find  x

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