A positive number when decreased by 4 is equal to 21 times the reciprocal of the number. Find the number?Options871912
Question
Solution 1
Let's denote the number as x.
According to the problem, we have the equation:
x - 4 = 21 * (1/x)
To solve this equation, we can first multiply both sides by x to get rid of the fraction:
x^2 - 4x = 21
Then, we can rearrange the equation to have it in the standard quadratic form:
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