Question

Lucas purchased 4 large posters and 6 small posters online and spent $21 on shipping. He spent x to ship each small poster and twice as much to ship each large poster. What is the cost of shipping a small poster? Explain your thinking.

Answer 1

$1.50

Explanation:

The shipping cost of a large poster is 2x, so the total shipping cost is ...

6x +4(2x) = $21

14x = $21 . . . . . . . simplify

x = $21/14 = $1.50 . . . . cost of shipping for a small poster

The cost of shipping a small poster is $1.50.