Wyatt has 10 blue envelopes. He has 4 fewer yellow envelopes than blue envelopes. How many envelopes does Wyatt have in all?
Wyatt has 10 - 4 = 
<gadget id="calculator">10-4</gadget>
<output>6</output>
6 yellow envelopes.
The total number of envelopes he has is 10 blue + 6 yellow = 
<gadget id="calculator">10+6</gadget>
<output>16</output>
16 envelopes.

<result>16</result>