Friday 11 December 2015

ABSOLUTE VALUE EQUATIONS-1


If │2x – 7 │= 42; Find  x

Solution

±(2x – 7 )= 42

2x -7= 42    OR   –(2x-7) = 42

2x – 7 = 42   OR   -2x+7= 42

2x = 42 + 7    OR   -2x = 42-7

2x = 49     OR   -2x  =  35
2      2                 2        2

x = 24.5  OR  x = 17.5


Hence x = 24.5 OR x = 17.5     


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


If │4x - 16 │= 48; Find  x

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