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Solve the given system of equations. 2y= -x+9 , 3x-6= -15

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.