Question

Define a variable and write an inequality. Then solve. A local summer baseball team plays 20 games each season. So far, they have won 9 games and lost 2. How many more games must they win this season to win at least 75% of all their games?

I don't know what define a variable means but here is my work

9 + 2 <= 20
they must win 6 more games

Answer 1

A variable can be a symbol or word used to represent some value. For this problem W could be a variable representing the number of additional games that they must win to have won 75%.
(number won so far) + (addtional won) >= 75% (total games)
substituting...
9 + W >= 0.75 * (20)
Solve for W

Answer 2

If they win n more games then
total games won = 9+n
(9+n)/20 >/=.75
9+n >/= 15
n>/= 6