Please answer my question and give me the explanation clearly. I will give you more points

Use the process of cross multiplication here
so
6=15
x=12.5
we need to find x by cross multipliying

so 15(x)
6(12.5)
so we get
15x= 75
now we divide 15

x= 75/15
x= 5 should be the answer

i hope it’s right
have any questions ask pls
have a great day :)

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.