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Y_Kistochka [10]
3 years ago
13

E is the midpoint of DF. IF DE = x + 5 and DF = 3x + 2, what is DF?

Mathematics
2 answers:
suter [353]3 years ago
8 0

Answer:

13

Step-by-step explanation:

If E is the midpoint, Then DE = FE

=> x+5 = 3x+2

=> 3x-x = 5-2

=> 2x = 3

=> x = 3/2

<u><em>Now DF:</em></u>

=> 3/2 + 5 + 3(3/2)+2

=> (3+10)/2 + (9+4)/2

=>  (13+13)/2

=> 26/2

=> 13

prisoha [69]3 years ago
6 0

Answer:

13

Step-by-step explanation:

x+5=3x+2

5=2x+2

3=2x

x=1.5

1.5+5=6.5

6.5 is half of DF, DF=13

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