SOLUTION: wat does it mean or called when there is a number in the lower right hand corner or a a vairable or other number please tell me how to solve thanks

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Question 137508: wat does it mean or called when there is a number in the lower right hand corner or a a vairable or other number please tell me how to solve thanks
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
It is called a subscript.
Instead of using x,y,z the author uses x1,x2,x3
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The subscript helps to distinguish one variable from another.
Cheers,
Stan H.