<human>:  Emily bought a shirt and a coat for $600. What does the shirt cost if it is one-third the price of the coat?
<bot>: Define a variable ** Let X be the price of the shirt.
What is the price of the coat? ** The price of the coat is X*3.
Write an equation ** The total amount is X + X*3 = $600.
Simplify ** Combining like terms, we get X*4 = $600.
Divide by 4 ** Dividing both sides by 4, we get X = $600 / 4 = $<<600/4=150>>150.
#### 150