Пошаговое объяснение:
1) х:8/9=3:4
4*x = 3 * 8/9
4x = 8/3
x = 8/3 : 4
x = 8/3 * 1/4
x = 2/3
2) х:2,8=5:7
7*x = 5*2,8
7x = 14
x = 14 : 7
x = 2
3) 12:7=9:х
12*x = 9*7
12x = 63
x = 63 : 12
x = 5,25
4) 6,5:5,2=х:8
5,2*x = 8*6,5
5,2x = 52
x = 52:5,2
x = 10
5) 4,5:3,6=х:4
3,6*x = 4,5*4
3,6x = 18
x = 18:3,6
x = 5
6)15:4=х:1 1/3
4*x = 15 * 1 1/3
4x = 15 * 4/3
4x = 20
x = 20:4
1) 2/3
2) 2
3) 5,25
4) 10
5) 5
6) 13,75
Пошаговое объяснение:
1) х:8/9=3:4
4*x = 3 * 8/9
4x = 8/3
x = 8/3 : 4
x = 8/3 * 1/4
x = 2/3
2) х:2,8=5:7
7*x = 5*2,8
7x = 14
x = 14 : 7
x = 2
3) 12:7=9:х
12*x = 9*7
12x = 63
x = 63 : 12
x = 5,25
4) 6,5:5,2=х:8
5,2*x = 8*6,5
5,2x = 52
x = 52:5,2
x = 10
5) 4,5:3,6=х:4
3,6*x = 4,5*4
3,6x = 18
x = 18:3,6
x = 5
6)15:4=х:1 1/3
4*x = 15 * 1 1/3
4x = 15 * 4/3
4x = 20
x = 20:4
x = 5
1) 2/3
2) 2
3) 5,25
4) 10
5) 5
6) 13,75
Пошаговое объяснение: