Решите уравнения: 1) 2000/х = 40 2) y/70 = 5 3) (60 * a - 32) : 16 = 3 4) 75 - 960 :...

Question

Решите уравнения:

1) 2000/х = 40

2) y/70 = 5

3) (60 * a - 32) : 16 = 3

4) 75 - 960 : (b+39) = 55

5) 12 7/23 - (6 18/23 - t) = 3 21/23 + 5 19/23

6) (k - 5 3/14) + 8 13/14 = 15 - 3 9/14

Answer 1

1) x = 2000/40
x = 50

2) y = 70*5
y = 350

3) 60*a - 32 = 3*16
60*a - 32 = 48
60*a = 48 + 32
60*a = 80
a = 80:60
a = 1 1/3

4) 960:(b+39) = 75 - 55
960:(b+39) = 20
b+39 = 960:20
b+39 = 48
b = 48 - 39
b = 9

5) 12 7/23 - (6 18/23 - t) = 9 17/23
6 18/23 - t = 11 30/23 - 9 17/23
6 18/23 - t = 2 13/23
t = 6 18/23 - 2 13/23
t = 4 5/23

6) (k - 5 3/14) + 8 13/14 = 11 5/14
k - 5 3/14 = 10 19/14 - 8 13/14
k - 5 3/14 = 2 6/14
k = 2 6/14 + 5 3/14
k = 7 9/14