9david 9david
  • 14-10-2017
  • Mathematics
contestada

15. Simplify: 5 (c-2d)-(d+3c)+(5c-8d)

A) 7c-19d
B) 13c-19d
C) 7c-11d
D) 13c-11d

Respuesta :

fvvti15
fvvti15 fvvti15
  • 14-10-2017
5(c-d)-(d+3c)+(5c-8d) = A) 7c-19d
Answer Link
WojtekR
WojtekR WojtekR
  • 14-10-2017
[tex]5(c-2d)-(d+3c)+(5c-8d)=5c-10d-d-3c+5c-8d=\\\\=5c-3c+5c-10d-d-8d=(5-3+5)c+(-10-1-8)d=\\\\=\boxed{7c-19d}[/tex]

Answer A)
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