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Applications (Word Problem)

A number is d...

Question

A number is doubled and 9 is added If the result is trebled it becomes 75 What is that number?

A

3.5

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B

6

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C

8

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D

7

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Solution

The correct option is D 8
Let the number be x
According to the question
3 ( 2x + 9) = 75 $\Rightarrow$ 6x + 27 = 75
$\Rightarrow$ 6x = 75 - 27 = 48 $\Rightarrow$ x = 8

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