emmajosephine6 emmajosephine6
  • 22-09-2020
  • Mathematics
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Can someone Help me on #9

Can someone Help me on 9 class=

Respuesta :

316628
316628 316628
  • 22-09-2020

Answer:

See Below

Step-by-step explanation:

If DF = 42, What is DE?

D__________E_______F

(7x + 1)         +    ( 4x-3)         = 42

7x+1+ 4x -3 = 42        Solve for x

11x -2 = 42

   +2    +2

11x = 44

11x / 11  = 44/ 11

x = 4

Now plug x in for the equation of DE

7x+1

7(4) + 1

28 + 1 = 29

DE = 19

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