Jamari has saved $30. He got a summer job walking dogs, and gets $8 for every dog he walks. Jamari wants to have enough money to buy a bike that costs $86.

Question

What does your answer of d=7 mean in this situation?
8d+30 = 86
d = 7

Jamari needs to save $7 more to to buy the bike.

Jamari needs to walk 7 dogs to have enough money to buy the bike.

Jamari needs to walk dogs for 7 weeks to buy the bike.

Answer 1

In the equation \(8d + 30 = 86\), \(d\) represents the number of dogs Jamari needs to walk in order to save enough money for the bike. The value \(d = 7\) means:

Jamari needs to walk 7 dogs to have enough money to buy the bike.

By walking 7 dogs, he will earn \(8 \times 7 = 56\) dollars. Adding that to his saved amount of $30 gives him \(30 + 56 = 86\) dollars, which is exactly the cost of the bike.