Asked by Lucy
                Working Backwards:
In the 1980's the Northen White Rhinoceros population decreased by 485 from what it was in the 1970s. By the 1990s the population increased 2 more than twice the population in the 1970s By the 2000s the population dropped 25 rhinoceroes to about 7 today what was the population in the 1970s
            
        In the 1980's the Northen White Rhinoceros population decreased by 485 from what it was in the 1970s. By the 1990s the population increased 2 more than twice the population in the 1970s By the 2000s the population dropped 25 rhinoceroes to about 7 today what was the population in the 1970s
Answers
                    Answered by
            Damon
            
    call the population in the seventies X
then in the eighties it was (X-485)
in the nineties it was 2+2X +(X-485) {I am taking the English here literally that the population "INCREASED" an amount 2+2X over what it was in the eighties. I hope you do not have a typo and it should be "INCREASED TO"}
in 2000s 2+2X +X - 485 -25 = 7
so there is your equation to solve for X
    
then in the eighties it was (X-485)
in the nineties it was 2+2X +(X-485) {I am taking the English here literally that the population "INCREASED" an amount 2+2X over what it was in the eighties. I hope you do not have a typo and it should be "INCREASED TO"}
in 2000s 2+2X +X - 485 -25 = 7
so there is your equation to solve for X
                    Answered by
            Sally
            
    500
    
                    Answered by
            Sally
            
    (7+25-2)/2+485=500
    
                    Answered by
            jackolodian
            
    its 300
    
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