Question

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

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

Answer 1

`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}`

Answer A)

Answer 2

5(c-d)-(d+3c)+(5c-8d) = A) 7c-19d