Question 1185174
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There are of course many ways to set this problem up for solving.  With the information that is given, here is what I would do.<br>
Let x be Erik's age 7 years ago
Then 3x = Zoe's age 7 years ago<br>
The difference in their ages 7 years ago was 3x-1=2x<br>
But the difference in their ages 7 years ago is the same as that difference now, which is 68 years:<br>
2x=68
x=34<br>
Erik's age 7 years ago was 34.<br>
ANSWER: Erik's age now is 34+7 = 41<br>