8 * (21040 - 9450) : 2 = ?

X * 3 + 435 = 1350

X - 1020 = 1520: 4

8 * (21040 - 9450) : 2 = 46360

1) 21040 - 9450 = 11590

2) 11590 * 8 = 92720

3) 92720 : 2 = 46360

х * 3 + 435 = 1350

х * 3 = 1350 - 435

х * 3 = 915

х = 915 : 3

х = 305

Проверка: 305 * 3 + 435 = 1350

915 + 435 = 1350

1350 = 1350

х - 1020 = 1520 : 4

х - 1020 = 380

х = 1020 + 380

х = 1400

Проверка: 1400 - 1020 = 1520 : 4

380 = 380