Wednesday 18 May 2016

INEQUALITIES 1


If │2x – 13 │= 21; Find  x

Solution

±(2x – 13 )= 21

2x -13= 21    OR   –(2x-13) = 21

2x – 13 = 21    OR   -2x+13= 21

2x = 21 + 13    OR   -2x= 21-13

2x = 34     OR   -2x  =  8
2      2                2        2

x = 17  OR  x = 4


Hence x = 17 OR x = 4     


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


If │4x – 16 │= 32; Find  x

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