<em>(х+1):1,6=15:3,2</em>
<em>х+1=1,6*15/3,2</em>
<em>х+1=15/2</em>
<em>х+1=7,5</em>
<em>х=6,5</em>
1/а - 2/b = (b-2a)/ab
4/c+3/2c = 8/2c + 3/2c= 11/2c
1)5:10=3:6
5/10=3/6
2)7:2=28:8
7/2=28/8
3)45:20=9:4
45/20=9/4
4)7:11=14:22
7/11=14/22
<span>A*(288-190) = 392
А* 98= 392
А = 392/98
А = 4</span>