03-09-2017
Mathematics

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Point M is the midpoint of AB. AM=3x+3, and AB=8x−6.
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What is the length of AM?

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Banabanana Banabanana

03-09-2017

If M is the midpoint of AB then AB = 2AM

8x - 6 = 2(3x + 3)
8x - 6 = 6x + 6
8x - 6x = 6 + 6
2x = 12
x = 12/2
x = 6

AM = 3x + 3 = 3*6 + 3 = 18 + 3 = 21 units

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