If two thirds of a number is decreased by 4, the result is 56. find the number
if 38 is added to 5/9 of a number, the result is 128. find the number
the sum of 3/5 of a number and 2.3 is 14.6. find the number.

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Let the number be x
There are actually 3 different statements - 

1. two-thirds of a number decreased by 5 is 56
2*x/3 - 4 =56
2*x/3=60
x=90

2. 38 added to 5/9 of number gives 128
i.e 5*x/9 + 38 = 128
5*x/9 = 90
x = 162

3. sum of 2.3 and 3/5 of number gives 14.6
i.e 2.3 + 3*x/5 = 14.6
3*x/5 = 12.3
x = 4.1*5
x = 20.5

Then just do it (lol)