seven sets of seven plus sixty two sets of seven

Question

What is the answer for the equation seven sets of seven plus sixty two sets of seven

Answer 1

Treat “sets of seven” like one object. Call it a box if you like. Now read the question again using boxes: “7 boxes + 62 boxes”.
Of course, the answer is 69 boxes. So the answer to the problem is 69 sets of seven. You don't need to know what sets of seven means.