Thirdly, variables are note-specific, meaning you can't use a variable declared in one note in another one. Fourthly, the variable names are also not case-sensitive. So, p is the same as P, and ...
In algebra, letters are used to stand for values that can change (variables) or for values that aren’t known (unknowns). A term is a number or letter on its own, or numbers and letters multiplied ...
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