Afarmer sells his corn for $220 a metric ton with a small surcharge of $35. his neighbor sells her corn crop for $220 a metric ton and gives a $10 rebate.
**write the cost model equations for both farmers and find the amount of corn that makes the costs equal.**

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.