1.zamien iloczyn na sume a) 3(x-3) 5(y+z) 4(3x-y) 3(4a-c) -2(7-4n) b) 0,2(x-5y) 3(0,5a+1)

a) 3(x-3) = 3x-9 5(y+z) = 5y+5z 4(3x-y) = 12x-4y 3(4a-c) = 12a-3c -2(7-4n) = -14+8n b) 0,2(x-5y) = 0,2x-y 3(0,5a+1) = 1,5a+3

a) 3(x-3)=3x-9=-9+3x 5(y+z)= 5y+5z 4(3x-y)= 12x-4y= -4y+12x 3(4a-c)=12a-3c= 3c+12a -2(7-4n)=-14+8n b) 0,2(x-5y)= 0,2x-y= y+0,2x 3(0,5a+1)= 1,5a+3