Question

I need help with this it doesn’t take long.

Answer 1

x=44

Explanation:

x=#of baseball cards to start with

1/2x+9=31

x/2+9=31

(-9) (-9)

then you take away 9 from both sides

x/2=22

then you times 22 by 2 which is 44

so that is the amount of cards you started with.