Question 1106533
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The difference between their ages is 42 years.  In particular, when Sara's aunt was 4 times as old as Sara, the difference in their ages was 42 years.  42 years older and 4 times as old means their ages were 14 and 56.<br>
Note: you might be able to figure that out using logical reasoning; if you want to see it algebraically, it might look like this:
{{{4x-x = 42}}}  [the difference between the ages of Sara's aunt, who is 4 times as old as Sara, and Sara, is 42]
{{{3x = 42}}}
{{{x = 14}}}<br>
So when Sara's aunt was 4 times as old as Sara, their ages were x=14 and 4x=56.<br>
Since that was 5 years ago, Sara's age now is 14+5 = 19.