мне решить эти уравнения хотябы 3​

Пошаговое объяснение:

( 400 :X + 5 ) - 5 = 200

400 : x + 5 = 200+5

400:x + 5 = 205

400 : x = 205 - 5

400 : x = 200

x = 400 : 200

x = 2

1000 - ( 4500 :X + 80 ) = 420

4500:x + 80 = 1000-420

4500:x + 80 = 580

4500:x = 580 - 80

4500:x = 500

x = 4500:500

x = 9

(54 :X + 30 ) x 2 = 72

54:x + 30 = 72:2

54:x + 30 = 36

54:x = 36 - 30

54:x = 6

x = 54 : 6

x = 9

8 * ( 36 + 4*X) = 480

36 + 4x = 480:8

36 + 4x = 60

4x = 60 - 36

4x = 24

x = 24 : 4

x = 6

(6*X + 12 ) : 6 = 50

6x + 12 = 50 * 6

6x + 12 = 300

6x = 300 - 12

6x = 288

x = 288 : 6

x = 48