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

4z = 3 * 52,

4z = 156,

z = 156 / 4,

z = 39.

3x = 48 * 8,

3x = 384,

x = 384 / 3,

x = 128.

9y = 27 * 8,

9y = 216,

y = 216 / 9,

y = 24.

2b = 28 * 7,

2b = 196,

b = 196 / 2,

b = 98.

11b = 12 * 55,

11b = 660,

b = 660 / 11,

b = 60.

12m = 60 * 13,

12m = 780,

m = 780 / 12,

m = 65.

5x = 20 * 4,

5x = 80,

x = 80 / 5,

x = 16.

6a = 7 * 42,

6a = 294,

a = 294 / 6,

a = 49.