(20 Баллов) Пожалуйста Решите

Question

(20 Баллов) Пожалуйста Решите

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Answer 1

a) 105/70 = x/4

70*x = 105*4

70*x = 420

x = 420 : 70

x = 6

b) 1/6 :x = 2: 3

2*x= 1/6 * 3

2*x = 4/7

x = 2/7

Answer 2

a)

70 * x = 105 * 4

70x = 420

x = 420 : 70

x = 6

б)

2 * x = 3 3/7 * 1/6

2x = 24/7 * 1/6

2x = 4/7

x = 4/7 * 1/2

x = 2/7

в)

1 2/7 * x = 5 1/7 * 2/3

9/7x = 36/7 * 2/3

9/7x = 24/7

x = 24/7 * 7/9

x = 8/3

x = 2 2/3

г)

2/9x * 5 = 14 * 2 1/7

10/9x = 14 * 15/7

10/9x = 30

x = 30 * 9/10

x = 27

д)

6,8 * (x + 2) = 8,5 * 2,4

6,8x + 13,6 = 20,4

6,8x = 20,4 - 13,6

6,8x = 6,8

x = 6,8 : 6,8

x = 1