1)3/8y=2,25
y=2 1/4:3/8
y=9/4*8/3
y=3*2
y=6
2)y:1,2=1 2/3
y=12/10*5/3
y=4/2
y=2
3)8,4:x=2 1/3
(7/3)x=84/10
x=84/10:7/3
x=84/10*3/7
x=12*3/10
x=3,6
4)0,6x=9/20
x=9/20:6/10
x=9/20*10/6
x=3/2*2
x=3/4
5) x:5/9=3,6
x=5/9*36/10
x=4/2
x=2
6) 5/6y=0,5
y=1/2:5/6
y=1/2*6/5
y=3/5
68
1) 1 1/3y+0,2=1
3/2y=1-0,2
3/2y=0,8
y=0,8:1,5
y=8/15
2) 3/25y-1,2=0,6
3/25y=0,6+1,2
y=1,8:3/25
y=(18/10)*25/3
y=6*5/2
y=15
3) 1,32x+4=10 3/5
1,32x=-4+10 3/5
1,32x=6 3/5
x=(33/5):132/100
x=(33/5)*100/132
x=20*11/44
x=20/4
x=5
4) 7/12x-0,5=1,25
7/12x=0,5+1,25
x=1,75:7/12
x=1 1/4:7/12
x=(5/4)*12/7
x=15/7
x=1 5/7
5) 5/6x-4,15=2,1
5/6x=2,1+4,15
x=6,25:5/6
x=6 1/4:5/6
x=(25/4)*6/5
x=5*3/2
x=15/2
x=7,5
6)2,7+2/9y=43
2/9y=43-2,7
y=40,3:2/9
y=(403/10)*9/2
y=3627/20
y=181 7/20