When Jayson is 10 his dad is four times his age and his mom is 2 years younger than his dad.  How old was Jayson's mom when he was born?
When Jayson is 10 his dad is 10 x 4 = 
<gadget id="calculator">10*4</gadget>
<output>40</output>
40 years old.
His mom is 40 - 2 = 
<gadget id="calculator">40-2</gadget>
<output>38</output>
38 years old.
When Jayson is born, his mom is 38 - 10 = 
<gadget id="calculator">38-10</gadget>
<output>28</output>
28 years old.

<result>28</result>