Question

решите уравнения
3/4=z/52
3/8=48:x
y/27=8/9
28:b=2/7
55/b=11/12
12/13=60/m
x/20=4/5
42/a=6/7

Answer 1

1. 3/4=z/52 |•104
    78/104 = 2z/104
    78=2z|:2
    z= 39

2. 3|8=48|x |•8x
    3x/8x = 384/8x
    3x=384
     x=128
Дальше сам(а) решай, т.к. мало баллов, а писать долго
    

Answer 2

3/4 = z/52
4z = 52*3
4z = 156
z = 39

3/8 = 48/x
3x = 48*8
3x = 384
x = 128

y/27 = 8/9
9y = 27*8
9y = 216
y = 24

28/b = 2/7
2b = 28*7
2b = 196
b = 98

55/b = 11/12
11b = 55*12
11b = 660
b = 60

12/13 = 60/m
12m = 13*60
12m = 780
m = 65

x/20 = 4/5
5x = 20*4
5x = 80
x = 16

42/a = 6/7
6a = 42*7
6a = 49