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
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