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Consider the following word problem: Twenty more than four times a number is equal to the difference between 2 and twice the number. Find the number.

User Libby
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1 Answer

15 votes
15 votes

Given:

The objective is to find the number.

Step-by-step explanation:

Consider the unknown number as x,

First, four times the number can be written as 4x.

Twenty more than 4 time the number will be,


4x+20\ldots\ldots.\text{ (1)}

Then, twice the number can be represented as 2x.

And the difference between 2 and twice the number will be,


2-2x\ldots\ldots..(2)

Now, equate both the equations (1) and (2).


\begin{gathered} 4x+20=2-2x \\ 4x+2x=2-20 \\ 6x=-18 \\ x=(-18)/(6) \\ x=-3 \end{gathered}

Hence, the unknown number is -3.

User Manpreet
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