Problem
. Ezra is saving money to buy a snowboard that costs \( \$ 225 \). He already has \( \$ 45 \) and can earn the rest by walking ten dogs. If \( d \) represents how much he earns for walking each dog, which of the following equations can be solved to find how much Ezra is paid for walking each dog? (A) \( 225=45 d-10 \) (B) \( 225-45=10 d \) (C) \( 25+45=10 d \) (D) \( 45=225-d \)
Solution
Step 1 ：225=45+10d
Step 2 ：180=10d
Step 3 ：d=18
