А+(-3b)+(-с)+b=a-3b-c+b=a-2b-c
(-6 х)+(-7y)+z=-6x-7y
(-m)+(-4n)+(-3p)=-m-4n-3p
(-0,6 а)+(-b)+c+(-3d)=-0,6a-b+c-3d
(-x)+6y+(-5z)=-x+6y-5z
m+(-3n)+8p=m-3n+8p
4f-(3b-c)=4f-3b+c
-m-(2n+k)=-m-2n-k
0.19+(4a-c)=0,19+4a-c
x+(8y-z)=x+8y-z
m+(9n-k-p)=m+9n-k-p
a-(4b+3c-d)=a-4b-3c+d
4(7-5x)-(12-20x)=28-20x-12+20x=16
3(3x-y)-(5x-2y)=9x-3y-5x+2y=4x-y
6(x+2y)-3(2x+y)=6x+12y-6x-3y=9y
5(4x+y)-2(x-y)=20x+5y-2x+2y=18x+7y