Two months ago, Wilson had a total of $150 in his bank account. Then last month, he deposited $17. A few days after, he made a withdrawal. This month, he deposited $21 so he has $16 more than what is in his account two months ago. How much did Wilson withdraw last month?
Wilson had $150 + $17= $
<gadget id="calculator">150+17</gadget>
<output>167</output>
167 two months ago before making a withdrawal.
His money in his account now is $150 + $16 = $
<gadget id="calculator">150+16</gadget>
<output>166</output>
166.
Since he deposited $21 this month, this means there was $166 - $21 = $145 last month after making a withdrawal.
Therefore, Wilson withdrew $167 - $145 = $
<gadget id="calculator">167-145</gadget>
<output>22</output>
22.

<result>22</result>