1. Suppose you get a job selling T-shirts at a concert. You get $2 for each T-shirt you sell, but it costs you $5 to get into the concert. How many T-shirts will you have to sell in order to make $25?
This is a word problem, so we should run through the steps for solving word problems.
1. Let x = how many T-shirts she would have to sell.
2. She gets $2 for each T-shirt she sells, but she has to pay $5 top get into the concert.
2x - 5 = 25
3. Add 5 to each side
2x = 30
Divide both sides by 2.
x = 15
She would have to sell 15 T-shirts to come home with $25.
4. Check: 15 T-shirts at $2/T-shirt would bring in $30. After she pays $5 to get into the concert, she would be left with $25.