Jenny buys a shirt for $24.50. She pays 90% of the original price. If s is the original price of the shirt, which equation represents the original price?
You can interpret "90% of the original price is $24.50" into algebra as: "0.90 · x = 24.50".
"90%" becomes "0.90"
"of" becomes "times" becomes "·"
"is" becomes "="
s=24.50
