<PRE><B>Question 15213</B>
&lt;font face = &quot;courier new&quot; size = 2&gt;
The sum of Carol&#39;s and Sandy&#39;s ages is 47. In 10 years Carol will be 
10 years older than Sandy was 7 years ago. Find their present ages.
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The sum of Carol&#39;s and Sandy&#39;s ages &lt;font color = &quot;red&quot;&gt;&lt;b&gt;(C+S)&lt;/font&gt;&lt;/b&gt; is 47. In 10 years Carol &lt;font color = &quot;red&quot;&gt;&lt;b&gt;(C+10)&lt;/font&gt;&lt;/b&gt;
will be 10 years older than&lt;font color = &quot;red&quot;&gt;&lt;b&gt;(10 more than)&lt;/font&gt;&lt;/b&gt; Sandy was 7 years ago &lt;font color = &quot;red&quot;&gt;&lt;b&gt;(S-7)&lt;/font&gt;&lt;/b&gt;.
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&lt;font color = &quot;red&quot;&gt;&lt;b&gt;(C+S)&lt;/font&gt;&lt;/b&gt; = 47
&lt;font color = &quot;red&quot;&gt;&lt;b&gt;(C+10)&lt;/font&gt;&lt;/b&gt; = 10 more than &lt;font color = &quot;red&quot;&gt;&lt;b&gt;(S-7)&lt;/font&gt;&lt;/b&gt;, which means &quot;&lt;font color = &quot;red&quot;&gt;&lt;b&gt;(S-7) plus 10&lt;/font&gt;&lt;/b&gt;&quot;   
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or
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C + S = 47
C + 10 = (S - 7) + 10
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Can you solve this system, after simplifying the second one?
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Answer: Carol is 20 and Sandy is 27
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Edwin </PRE>