Saturday, 3 August 2013

ABSOLUTE VALUE-3


If 4x + 7 = 47; Find  x


Solution


±(4x + 7 )= 47


4x +7= 47    OR   –(4x+7) = 47


4x+ 7 = 47    OR   -4x - 7=47


4x = 47- 7    OR   -4x= 47 + 7


4x = 40     OR     -4x  =  54
4       4                   4        4


x = 10  OR  x = 27/2 = 13.5



Hence,  x =10  OR  x = 13.5  



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