Theo bought a pen for $2 and a piece of paper that cost $1 less than three times the price of the pen. She gave the cashier $10. What is the amount of change Theo received?
Three times the cost of pen is $2 x 3 = $
<gadget id="calculator">2*3</gadget>
<output>6</output>
6.
The cost of paper is $6 - $1 = $
<gadget id="calculator">6-1</gadget>
<output>5</output>
5.
The total cost for the pen and paper is $2 + $5 = $
<gadget id="calculator">2+5</gadget>
<output>7</output>
7.
Theo received $10 - $7 = $
<gadget id="calculator">10-7</gadget>
<output>3</output>
3 change.

<result>3</result>