Roman and Remy took separate showers. Remy used 1 more gallon than 3 times the number of gallons that Roman used for his shower. Together the boys used 33 gallons of water.  How many gallons did Remy use?
Let R = Roman's gallons.
Remy = 3R + 1
4R + 1 = 33
4R = 
<gadget id="calculator">32</gadget>
<output>32</output>
32.
R = 
<gadget id="calculator">8</gadget>
<output>8</output>
8.
Remy used 25 gallons of water for his shower.

<result>25</result>