Question 1003671
If five times the square of a positive number is added to the product of 31 and the number, the result is 28. Find the number.
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Equation:
5x^2 + 31x - 28 = 0
(5x-4)(x+7) = 0
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Ans: x =  4/5
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Cheers,
Stan H.
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Options are:
4/5
-4 
-7/5 
7