Answers

2014-10-16T19:58:14+08:00
23 . the double is 46 - 6 .. divided by 2 ~ 20 
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2014-10-16T20:48:37+08:00
Let 'x' be the number
-doubling the number you will have
   2x
-subtracting 6 from 2x and dividing the difference by 2 you'll have:
   \frac{2x - 6}{2} = 20
-cross multiply 2
  2x - 6 = 20(2)
   2x - 6 = 40
   2x = 40 + 6
   2x = 46
     x = 23
therefore the number is 23
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