a number is doubled and 9 is added. if resultant is trebled, it becomes 75. what is that number
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Given :
A number is doubled and 9 is added. If the resultant is tripled it becomes 75.
To find :
The original number.
Solution :
Let the number is x
It is doubled = 2x
Then added 9 = 2x+9
Resultant is tripled. = 3(2x+9)
According to the given question :
=> 3(2x+9) = 75
=> 6x + 27 = 75
=> 6x = 75 - 27
=> 6x = 48
=> x = 48/6 = 8.
=> x = 8
Hence, the original number is 8.
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