5c-4-2c+1=8c+2
Hallo anonymous!
5c - 4 - 2c + 1 = 8c + 2 both sides : - 8c + 4 - 1
5c - 2c - 8c = 2 + 4 - 1
- 5c = 5 both sides : / ( - 5 )
c = - 1
:- )