Question 764892
The original number = x
(5 - 4x)
Doubled
2(5 - 4x) = 6
10 - 8x = 6
   -8x = 6 - 10
   -8x = -4
     x = -4/-8
     x = 1/2
This is the original number.
Proof:
2(5 - 4x) = 6
2(5 - 4(1/2)) = 6
2(5 - 2) = 6
      6 = 6
Hope this helps.
:-)