K can be a variable, it is commonly a variable in the quadratic equation
y=a(x-h)2+k
K is the y-intercept.
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K = D + 3 where the letters represent the number of problems solved by Ki and Daniel respectively.
k=8k+28 k-8k=28 -7k=28 k=-(28/4) k=-4
a variable??
words and maths...hm Well if you mean letters in math then they are pro numerals, which are used in algebra to represent numbers. Words in maths may represent numbers also, otherwise i am unsure