Answer:
r = 28 - p
Step-by-step explanation: The most points Sidney has scored in a basketball game is 28.
She is trying to tie that record in her current game.
Let r be the number of points needs to score
p is the points she scored already
Total record in basket ball game = 28
points needs to score + scored already = total record
So equation becomes p + r = 28
Subtract p on both sides