4a – 5b + c – (-3) +4b – 6c

4a – 5b + c – (-3) + 4b – 6c
= 4a – 5b + c + 3 + 4b – 6c
= 4a – 5b + 4b + c – 6c + 3
= 4a – b – 5c + 3

Variabel: a, b, c
koefisien: 4, 5, 6
konstanta: -3