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27-09-2021
Mathematics

contestada

if df = 9x-39 find ef. de = 47 ef= 3x+10

Respuesta :

sqdancefan sqdancefan

29-09-2021

9514 1404 393

Answer:

EF = 58

Step-by-step explanation:

We assume point E lies on line segment DF, so that ...

DF = DE +EF

9x -39 = 47 +(3x +10)

6x = 96 . . . . . . . . . . . . . . . subtract (3x-39)

x = 16 . . . . . . . . . . . divide by 6

EF = 3×16 +10 = 58

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