SOLUTION: LM = 7y + 9 MN = 3y + 4 LN = 143

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Question 155790This question is from textbook Mc Dougal Littell Geometry
: LM = 7y + 9
MN = 3y + 4
LN = 143This question is from textbook Mc Dougal Littell Geometry

Answer by checkley77(12569) About Me  (Show Source):
You can put this solution on YOUR website!
lm+mn=ln
7y+9+3y+4=143
10y+13=143
10y=143-13
10y=130
y=130/10
y=13 answer.
proof
7*13+9+3*13+4=143
91+9+39+4=143
143=143