Question

Billy Bob is selling custom t-shirts for $18 per shirt, plus $21.50 for shipping. Sammy Sam is also selling custom t-shirts for $22 per shirt, plus $5.50 for shipping. Write an equation used to find how many shirts (s) Billy Bob and Sammy Sam would each have to sell to earn the same amount of money. (no spaces or $ signs) How many shirts would Billy Bob and Sammy Sam have to sell to earn the same amount of money? (number only)

Answer 1

Billy Bob is selling custom t-shirt for $18 per shirt plus $21.50 for shipping .

Sammy Sam is selling custom t-shirt for $22 per shirt plus $5.50 for shipping .

Let

x = number of shirt sold

`\begin{gathered} 18x+21.50=22x+5.50 \\ \text{collect like terms} \\ 18x-22x=5.50-21.50 \\ -4x=-16 \\ \text{divide both sides by -4} \\ (-4x)/(-4)=(-16)/(-4) \\ x=4 \end{gathered}`

For both of them to earn the same amount of money both of them will have to sell 4 shirt each.