62/11-3x=19/11
62-19/11=3x
3x=43/11
x=1.3
X:5/9=3,6
x=5/9*3,6
x=5/9*36/10
x=1/1*4/2
x=4/2=2
0,6*x=9/20
x=9/20:0,6
x=9/20*10/6
x=3/2*1/2
x=3/4
5/6*y=0,5
y=0/5:5/6
y=5/10*6/5
y=1/5*3/1
y=3/5
<span>х+(х-0,3)+(х*1,2)=2*4,7
х+х-0,3+1,2х=9,4
2х+1,2х=9,4+0,3
3,2х=9,7
х=3,03125</span>
1)1 1/4+1/12=1 4/12= 1 1/3
2)1 4/5*1 1/3=9/5*4/3=12/5=2 2/5
3)2 2/5:3=12/3:3/1=4/3=1 1/3
4)7-1 1/3=7/1-4/3=21/3-4/3=17/3=5 2/5