In Exercise, solve the given problems.
In blending two gasolines of different octanes, in order to find the number n of gallons of one octane needed, the equation 0.14n + 0.06(2000 − n) = 0.09(2000) is used. Find n, given that 0.06 and 0.09 are exact and the first zero of 2000 is significant.
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