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OpenStudy (anonymous):
suppose S is between R and T. Use the segment addition postulate to solve for each variable. RS= 7y-4 , ST= y+5 , RT= 28
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jimthompson5910 (jim_thompson5910):
using the segment addition postulate, we can say RS + ST = RT (7y-4) + (y+5) = 28 7y - 4 + y + 5 = 28 8y + 1 = 28 I'll let you finish
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