Решите уровнения 1) (212z-199z) - 9=30 2) (410y-395y) + 9=84. 3) 1000 - (501x+19x) = 480. 4) 999 + (602z-582z) = 2198

(212z-199z) - 9=30. (410y-395y) + 9=84

13z-9=30. 15y+9=84

13z=30+9. 15y=84-9

13z=39. 15y=75

z=39:13. y=75:15

z=3. y=15

1) (212z-199z) - 9=30

13z=30+9

13z=39

z=39/13

z=13

2) (410y-395y) + 9=84

15y=84-9

15y=75

y=75/15

y=5

3) 1000 - (501x+19x) = 480

1000-520x=480

-520x=480-1000

-520x=-520

x=-520 / (-520)

x=1

4) 999 + (602z-582z) = 2198

999+20z=2198

20z=2198-999

20z=1599

z=1599/20

z=79,95