Question #243795

1fLN= 6r -5, LM=r+ 7, and MN = 3r + 20,

find MN.


Expert's answer

LN+LM=MNLN+LM=MN

6r5+r+7=3r+206r-5+r+7=3r+20

r=4.5r=4.5

MN=33.5MN=33.5


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