Write and solve a system of simultaneous equations for the following verbal problem. The sum of two numbers is 6. Three times the larger equals the sum of 6 and four times
the smaller.

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.

Do the inverse operation