these are the points on a line
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1 Answer

RS+ST=RT, so 8y+4+4y+8=15y-9,

12y+12=15y-9,

21=3y, y=7,

RS=8y+4=60, ST=4y+8=36, RT=60+36=96, also 15y-9=96.

by Top Rated User (825k points)

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