Is a factor or a coefeshent
You are suppose to subtract making it
X+7=13
-7=-7
______
X=6
24:15 would be the simplified version, if that's what you meant.
1/3•3.14•. r^2 •h
1/3•3.14•20^2•25
10466.6667
that rounds up to 10,467.
I could be wrong though!
hope this helps! :)