TavcateldFlo TavcateldFlo

12-01-2017
Mathematics

contestada

Solve the equation for c.

c(c + 3) - c(c - 4) = 9c - 16

1.6

2.6

2

8

Respuesta :

doodle10 doodle10

14-01-2017

Answer = 8

Because:

c(c + 3) - c(c-4) = 9c - 16
c^2 + 3c - c^2 + 4c = 9c - 16
3c + 4c = 9c - 16
7c = 9c - 16
7c + 16 = 9c
16 = 2c
8 = c

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