Answer:
QR = 37
ST = 37
Explanation:
QR = ST
3y + 19 = 6y + 1
19 -1 = 6y - 3y
18 = 3y
y = 18/3 = 6
substitute
QR = 3(6) + 19 = 37
ST = 6(6) + 1 = 37
length of all sides are equal
so QR = ST
combine like terms
y = 18/3
y = 6
QR = 3(6) + 19
ST = 6(6) + 1
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