Sagot :
You can make this an equation:
(x/2)+9=12 -- subtract 9 from both sides
x/2=3 -- multiply by 2
x=6
He started with 6 comic books.
(x/2)+9=12 -- subtract 9 from both sides
x/2=3 -- multiply by 2
x=6
He started with 6 comic books.