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Zielflug [23.3K]

3 years ago

10

PLS ANSWER QUICKLY!!

1 answer:

olganol [36]3 years ago

6 0

Answer:

EF=6

Step-by-step explanation:

E is the midpoint, so DE = EF

DE = 15-3x

EF = x+ 3

Since DE = EF,

15 - 3x = x + 3

-4x = -12

x = 3

If x = 3,

DE = 15 - 3*3, 15 - 9 = 6

EF = x+ 3, so EF = 3 + 3 = 6

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