I’ll mark brainliest! Please help !

X+3+2x+4+7x+3 = 60
10x + 10 = 60
10x = 50
X = 5

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.