Answer: y=78 TS=156 SR=96
Explanation:
TU=30 UR=30 TS=2y SR=y+18
TU+UR+SR=TS
30+30+y+18=2y
78+y=2y
78+y-y=2y-y
78=y
TS=2*78
TS=156
SR=78+18
SR=96
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