Question 1185169
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<U>Formally</U>



<pre>
Formally, you write an equation as you read the text


    x - 5 = {{{x/2}}}.


You solve it


    x = {{{x/2}}} = 5

    {{{x/2}}} = 5

    x = 10.


<U>ANSWER</U>.  Osei is 10 years old.
</pre>


Solved.



<U>Informally</U>


<pre>
Informally, a reader  should guess the answer in 5 - 7 seconds.
</pre>