Asked by Deen
                If B is the midpoint of segment AC, AB = x+7   , and AC =  5x−7 , then what is the length of BC?
            
            
        Answers
                    Answered by
            Deen
            
    x=2
    
                    Answered by
            mathhelper
            
    Make your sketch to see that BC = AC - AB
= 5x-7 - (x+7)
= 4x - 14
but AB = BC
x+7 = 4x - 14
21 = 3x
x = 7
BC = 4x-14 = 28-14 = 14
    
= 5x-7 - (x+7)
= 4x - 14
but AB = BC
x+7 = 4x - 14
21 = 3x
x = 7
BC = 4x-14 = 28-14 = 14
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