Помогите пожалуйста с математикой. Задание 123 и 125

123)

1)

3 * x = 15 * 6

3x = 90

x = 90 : 3

x = 30

2)

5 * y = 50 * 9

5y = 450

y = 450 : 5

y = 90

3)

26 * z = 39 * 2

26z = 78

z = 78 : 26

z = 3

4)

24 * t = 66 * 4

24t = 264

t = 264 : 24

t = 11

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125)

1)

16 * a = 20 * 4

16a = 80

a = 80 : 16

a = 5

2)

40 * c = 25 * 8

40c = 200

c = 200 : 40

c = 5

3)

27 * b = 39 * 9

27b = 351

b = 351 : 27

b = 13

4)

49 * d = 32 * 12

49d = 384

d = 384 : 49

d = 7 41/49