1) -2*(1/4+x)-6*(1/16-2x)=3x
-1/2-2x-3/8+12x=3x
10x-3x=3/8+4/8
7x=7/8
x=7/8×1/7=1/8
2) 1/3x+7/18-1 5/24-2 1/18+3/12x
1/3x+3/12x=4/12x+3/12x=7/12x
7/18-2 1/18=7/18-37/18= -30/18= -5/3
-5/3-29/24=-40/24-29/24= -69/24= -23/8
7/12x= -23/8
x= -23/8×12/7=69/14= -4 13/14
3) 15/22-(4-1 5/6):x=1 5/33
4-1 5/6=24/6-11/6=13/6
1 5/33-15/22=38/33-15/22=76/66-45/66=31/66
13/6:x=31/66
31/66x=13/6
x=13/6×66/31
x=143/31=4 19/31
(270:x-18)*9=108;
270:x-18=108:9;
270:x-18=12;
270:x=12+18;
270:x=30;
x=270:30;
x=9.
альбатрос 3 м перев в мм-3000 и перев 20 см в мм -200 ,ответ 3200мм
лебедь =2600
орлан -2550 мм
ворон- 1250 мм
7 = (7·8)/8 = 56/8 7 и 5/8 = 56/8 и 5/8
9 = (9·4)/4 = 36/4 9 и 1/4 = 36/4 и 1/4
4 = (4·7)/7 = 28/7 3/7 и 4 = 3/7 и 28/7
8 = (8·10)/10 = 80/10 9/10 и 8 = 9/10 и 80/10
15 = (15·10)/10 = 150/10 15 и 3/10 = 150/10 и 3/10
20 = (20·8)/8 = 160/8 20 и 3/8 = 160/8 и 3/8
9 = (9·12)/12 = 108/12 9 и 5/12 = 108/12 и 5/12
3 = (3·11)/11 = 33/11 7/11 и 3 = 7/11 и 33/11