Номер 382

x – 500 = 400
x = 400 + 500
x = 900
900 – 500 = 400
400 = 400

y + 1000 = 6000
y = 6000 – 1000
y = 5000
5000 + 1000 = 6000
6000 = 6000

400 : z = 25
z = 400 : 25
z = 16
400 : 16 = 25
25 = 25