The other number is 18/y.
Analogous or equivalent in character, form, or function; comparable.
I hope that this answer helps you.
A subtracted from b means b-a
7g+11 subtracted from 12 means 12-(7g+11)=12-1(7g+11)=12-7g-11=12-11-7g=1-7g
Florence is closer to finishing the race