33 1/3 % - Х 33 1/3% - 18
100% - 60 100% - Х
Х = 33 1/3 х 60 : 100 Х = 100 х 18 : 33 1/3
Х = 60 Х = 54
3 6/7 х - 7/9 х+4 4/63=3 54/63 х - 49/63 х +4 4/63=3 5/63 х +4 4/63
или
3 6/7 <span>х - 7/9 х+4 4/63 х=3 54/63 х - 49/63 х +4 4/63 х=3 5/63 х +4 4/63 х=7 9/63 х=7 1/7 х</span>
4,63x-3,37x=1,95
1,26x=1,95
x=1,95/1,26
x=1,3
5х-8=22 -(5х-8)=22
5х=22+8 -5х+8=22
<span>5х=30 -5х=22-8
</span>х=30/5 -5х=14
х=6 х=-14/5
х=-2,8
х=6;<span>х=-2,8</span>