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0,2(x-5y)=0,2x-y
b)
-⅓(a+3b)-2a= dla a=1/4 b=-⅓
-1/3a-b-2a=-2 1/3a-b
2 1/3*1/4-(-1/3)=7/12+1/3=7/12+4/12=11/12
c)
6(3+z)-4(2z+4)+2(8+z)= dla z=1/9
18+6z-8z-16+16+2z=18
d)
-4(2x-7-3y)-12(-y-x)= dla x=-1 dla y=0
-8x+14+12y+12y+12x=4x+14+24y=4(-1)+14+24*0=-4+14=10
0,2x-y
b)-1/3(1/4-1)-1/2=
-4/12(3/12-12/12)-1/2=
-1+4-1/2=2,5
c)6(3+1/9)-4(2/9+4)+2(8+1/9)=
18+6/9-8/9-16+16+2/9=18 i 1/9
d)-4(-2-7-0)-12(+1-0)=
8+28+0-12+0=24