tentukan a+b+c jika 2x + 4y - 15 = ax + by + c JAWAB PAKE CARANYA ,MAKASI

[tex]2x + 4y - 15 = ax + by + c \\ a = 2 \\ b = 4 \\ c = - 15 \\ \\ a+b+c = 2 + 4 + ( - 15) \\ = - 9[/tex]