Odpowiedzi

2010-03-04T17:57:43+01:00
5(3z-7)-9(-8z-6)= 15z-35-9+72z+54=87z+10
-3(5x-4)+8(-3x+2)=-15x+12-24x+16=-39x+28
7x-3(5x+2)-6(7+2x)=7x-15x-6-42-12x=-20x-48
-5(3y-7)-2(6+4y)+3y=-15y+35-12-8y+3y=-20y+23