Saturday, 12 November 2016

INEQUALITIES 1


If │4x – 7 │= 17; Find  x

Solution

±(4x – 11 )= 17

4x -11= 17    OR   –(4x-11) = 17

4x – 11 = 17    OR   -4x+11=17

4x = 17 + 11    OR   -4x= 17-11

4x = 28     OR   -4x  =   6
4      4               -4        -4

x = 7  OR  x = -3/2


Hence x = 7 OR x = -3/2    

TRY THIS………………………. 


If │4x – 7 │= 25; Find  x

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