<span>2 (3х-5)-3 (1-2х)-4х=-3
6х-10-3+6х-4х=-3
8х-13=-3
8х=13-3
8х=10
х=10/8
х=1,25
</span>
НОК(21:132)= 7*3*2 *2*11=924
<span>5,7928:44,56*100=13%</span>
№49)а)2/3 : 4/5= 10:12
2/3 : 4/5=5/6
10:12=5/6
5/6=5/6 да
в)4/11 : 4/5=48:110
48:110=24/55
4/11 : 4/5=5/11= 25/55
25/55 > 24/55 нет
№53)б)х/3 = 2/5
1/3 x= 2/5
x= 2/5 : 1/3
x=1 и 1/5
г)x/16 = 9/32
x= 9/32 : 1/16
x=4 и 1/2
№47)б)1:5 и 17:85
1:5= 1/5
85:17= 1/5
1/5= 1/5
г)20:8 и 35:14
20:8= 2 и 1/2
35:14= 2 и 1/2
1/2=1/2
)