points L,M and N are collinear with M between L and N. LM = 2x + 8 and MN is one half the length of LM.?

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if LN = 42 find x
i keep getting x = 17 =(

2007-11-04 12:14:48 · 2 answers · asked by cow man 1 in Science & Mathematics ➔ Mathematics

2x + 8 + x + 4 = 42
3x + 12 = 42
3x = 30
x = 10
LM = 28

2007-11-04 12:20:04 · answer #1 · answered by norman 7 · 0⤊ 0⤋

LM=2X+8
MN=X+4
LM+MN=LN
2X+8+X+4=42
3X+12=42
3X=30
X=10. IS THE ANSWER.

2007-11-04 12:20:16 · answer #2 · answered by Anonymous · 0⤊ 0⤋