<human>:  Sally is selling boxes of crackers for her scout troop's fund-raiser. If she sells 50% more on Sunday than she sold on Saturday, then she'll have sold a total of 150 boxes on the two days. How many boxes did she sell on Saturday?
<bot>: Define a variable ** Let S be the number of boxes sold on Saturday.
Write an equation ** S+1.5S=150
Combine like terms ** 2.5S=150
Divide by 2.5 ** S=<<60=60>>60
How many boxes did she sell on Saturday? ** Sally sold 60 boxes on Saturday.
#### 60