Реши уравнения 9x - 3x = 666 x³ = 1331 3x + 5x + 8x = 1640

Question

Реши уравнения

9x - 3x = 666
x³ = 1331
3x + 5x + 8x = 1640

Answer 1

1) 9x - 3x = 666

6х = 666

х = 666 : 6

х = 111

2) x³ = 1331

х = ∛(1331)

х = 11

3) 3x + 5x + 8x = 1640

16х = 1640

х = 1640 : 16

х = 102,5