Wednesday, 23 April 2014

INEQUALITIES D1



If 11x + 7 16 + 7x 15x – 12; find x.

Solution

11x + 7 16 + 7x and  16 + 7x 15x – 12

11x – 7x 16 - 7  and  15 +12 15x - 7x

4x 9 and  27 8x 

4x 9  and  27 8x
4      4           8      8

x 9/4 and  27/8 x

x 9/4   and  x  27/8


TRY THIS………………….

If 11y + 7 16 + 7y 15y – 17; find y.

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