Question 1194530
<pre>
                NUMBER
LONG            x+23
MIDDLE         (1/3)(x+23)
SHORT            x
Sum             40
</pre>

{{{(x+23)+(1/3)(x+23)+x=40}}}

-

{{{3(x+23)+(x+23)+3x=120}}}

{{{3x+69+x+23+3x=120}}}

{{{7x=120-69-23}}}

{{{7x=28}}}

{{{highlight(x=4)}}}

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