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Mathematics
OpenStudy (anonymous):

the sum of 8 and a number is 31 (need the equation.)

OpenStudy (anonymous):

Let a variable be that number.

OpenStudy (anonymous):

What variable would you like to use?

OpenStudy (texaschic101):

" the sum " represents an addition problem the sum of 8 and a number....lets call the number n 8 + n " is " means equals = so we end up with ... (8 + n) = 31

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