A)1/2*(х+4/5)-(1/5-х)=0
1/2x+1/2×4/5-1/5+x=0
1 1/2x=1/5-2/5
3/2x= -1/5
X= -1/5×2/3
X= -2/15
б)-2/3*(6/7-у)+(2/7+у)=0
-4/7+2/3y+2/7+y= 0
1 2/3y=2/7
y=2/7×3/5
y=6/35
в)-(у+1/8)+3/4*(2+у)=0
-y-1/8+3/2+3/4y=0
-1/4y=1/8-3/2
-1/4y=1/8-12/8
-1/4y= -11/8
y=11/8×4
y=11/2
y=5 1/2
г)1/9*(3/5-х)-(х-1/15)=0
3/45-1/9x-x+1/15=0
-1 1/9 x= -6/45
x=6/45×9/10
X=3/25