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