Tracy, Michelle, and Kati take a road trip that is a total of 1000 miles.  Tracy drives 20 miles more than twice Michelle, and Michelle drives 3 times the amount that Katie drives. How many miles does Michelle drive?
Let x represent the number of miles Kati drives.
Michelle:3x.
Tracy:20+2(3x)=20+6x.
Total:x+3x+20+6x=1000
10x+20=1000
10x=980
x=
<gadget id="calculator">98</gadget>
<output>98</output>
98 miles
3(98)=
<gadget id="calculator">3*98</gadget>
<output>294</output>
294 miles.

<result>294</result>