Larry spent $5 for lunch and gave his brother $2. How much did Larry have at the beginning if he has $15 now?
Larry spent a total of $5 + $2 = $
<gadget id="calculator">5+2</gadget>
<output>7</output>
7.
He has $15 + $7 = $
<gadget id="calculator">15+7</gadget>
<output>22</output>
22 at the beginning.

<result>22</result>