2*(x+3y+8z-6)+3*(2x-4y-5z+8)=
źródło:
2*(x+3y+8z-6)+3*(2x-4y-5z+8)= 2x+6y+16z-12 + 6x-12y-15z+24= 2x+6x + 6y-12y + 16z-15z - 12+24= 8x-6y+z+12
2*(x+3y+8z-6)+3*(2x-4y-5z+8)=2x+6y+16z-12+6x-12y-15z+24=8x-6y+z+12