Answer:
SN = 25
Explanation:
30 - 12 = 18 (DL)
Since the triangles are similar: 18/30 = 3/5 = (2x + 7)/(6x + 1)
Cross multiply: 5(2x + 7) = 3(6x + 1)
10x + 35 = 18x + 3
8x + 3 = 35
8x = 32
x = 4
SN = 6(4) + 1 = 25
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