Question

помогите с уравнениями плиз: (212z-199z)-9=30 (410y-395y)+9=84 1000-(501x+19x)=480 999+(602z-582z)=2199

Answer 1

13z=30-9
13z=21
Z=21-13
Z=8

Answer 2

 (212z-199z)-9=30

 13z=30+9

13z=39

z=39:13

z=3

(410y-395y)+9=84

15y=84-9

15y=75

y=75:15

y=5

1000-(501x+19x)=480

520x=1000-480

520x=520

x=520:520

x=1

999+(602z-582z)=2199

20z=2199-999

20z=1200

z=1200:20

z=60