Abdul planned a pool t be 24-feet long. To fit in his had, however , the pool can only be 20..feet long. Abduls ratio and work is below where did he make a error

You would add 12 to the number line because it would make it the opposite of -6 which is 6 then you go 6-12(MAKE SURE IN THAT ORDER) which would give you the opposite of 6 which is -6 so to show this draw a line from -6 to 6 then above that a line from 6 to -6