3 years ago

How did I lose 5 points?

Mathematics

1 answer:

PolarNik [594]3 years ago

4 0

x + 4 = 3x - 8, is assuming D is the midpoint, and therefore ED = DB.

all we know is that D is <u>somewhere</u> in EB.

$\bf E\stackrel{x+4}{\rule[0.35em]{17em}{0.25pt}}D\stackrel{3x-8}{\rule[0.35em]{10em}{0.25pt}}B
\\\\\\
EB=ED+DB\implies EB=(x+4)+(3x-8)\implies EB=4x-4$

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