SOLUTION: suppose M is between L and N use segment addition postulate to solve for the variable then find lengths of line LM, line MN,and line LN LM= 7y+9 MN=3y+4 LN= 143

Algebra ->  Points-lines-and-rays -> SOLUTION: suppose M is between L and N use segment addition postulate to solve for the variable then find lengths of line LM, line MN,and line LN LM= 7y+9 MN=3y+4 LN= 143      Log On


   



Question 261881: suppose M is between L and N use segment addition postulate to solve for the variable then find lengths of line LM, line MN,and line LN
LM= 7y+9
MN=3y+4
LN= 143

Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
LM + MN = LN by the segment addition postulate
So,
7y+%2B+9+%2B3y+%2B+4+=+143
combine like terms to get
10y+%2B+13+=+143
subtract 13 to get
10y+=+130
divide to get
y+=+13
LM = 100
MN = 43