ответ:
1) 1 : 3/8 = 1 * 8/3 = 8/3;
2) 5/12 : 17/18 = 5/12 * 18/17 = (5 * 18)/(12 * 17) = 15/34;
3) 3/4 : 5/18 = 3/4 * 18/5 = (3 * 18)/(4 * 5) = 27/10;
4) 1 2/3 : 1 1/3 = (1 * 3 + 2)/3 : (1 * 3 + 1)/3 = 5/3 : 4/3 = 5/3 * 3/4 = 5/4;
5) 4/9 : 11/9 = 4/9 * 9/11 = 4/11;
6) 0,8 : 0,03 = 8/10 : 3/100 = 8/10 * 100/3 = (8 *100)/(10 * 3) = 80/3;
7) 2 5/8 : 3 1/6 = (2 * 8 + 5)/8 : (3 * 6 + 1)/6 = 21/8 : 19/6 =21/8 * 6/19 = (21 * 3)/(4 * 19) = 63/76;
8) 3 1/2 : 3,6 = (3 * 2 + 1)/2 : 36/10 = 7/2 * 10/36 = 35/36.
пошаговое объяснение:
Пошаговое объяснение:
а) 4х-х= -9-3
3х= -12
х= -4
б) 42-9= 2х+х
33=3х
11=х
х=11
в) 7х-3х=27-3
4х=24
х=6
г) 5х+20-12=9х
8=9х-5х
8=4х
2=х
х=2
д) 6=3х-х-6
6+6=4х
12=4х
3=х
х=3
е) 8-20-15х=18
-15х=18-8+20
-15х=30
х= -2
ж) 17 -х=8-4х
17-8= -4х+х
9=3х
х=3