document.write( "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
\n" ); document.write( " LM= 7y+9
\n" ); document.write( " MN=3y+4
\n" ); document.write( " LN= 143 \n" ); document.write( "

Algebra.Com's Answer #192962 by drk(1908) $\"\"$ $\"About$

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LM + MN = LN by the segment addition postulate
\n" ); document.write( "So,
\n" ); document.write( " $\"7y+%2B+9+%2B3y+%2B+4+=+143\"$
\n" ); document.write( "combine like terms to get
\n" ); document.write( " $\"10y+%2B+13+=+143\"$
\n" ); document.write( "subtract 13 to get
\n" ); document.write( " $\"10y+=+130\"$
\n" ); document.write( "divide to get
\n" ); document.write( " $\"y+=+13\"$
\n" ); document.write( "LM = 100
\n" ); document.write( "MN = 43 \n" ); document.write( "

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