dan and chris share in the profits of a toy store. if the total profit is $80,000 and c is the amount chris receives, write an expression for the amount dan receives.

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.