<PRE><B>Question 1200068</B>
&lt;br&gt;
Always be aware of the possibility of solving a problem using formal algebra by setting up the problem in different ways.&lt;br&gt;
The other tutor has provided one typical solution, starting by using Joseph&#39;s current age as the variable.&lt;br&gt;
Here is an alternate setup for solving the problem.&lt;br&gt;
Let x be Joseph&#39;s age 10 years ago.&lt;br&gt;
Then Joseph&#39;s age 25 years from now will be x+35.&lt;br&gt;
Joseph&#39;s age 25 years from now will be 8 times his age 10 years ago:&lt;br&gt;
{{{x+35=8x}}}
{{{7x=35}}}
{{{x=5}}}&lt;br&gt;
Joseph was 5 years old 10 years ago, so his age now is 15.&lt;br&gt;
ANSWER: 15&lt;br&gt;
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