<span>5*4^(x-1)=5
4^(x-1)=1
x-1=0
x=1
</span>
В 3 дм 30 см +8 см =38 см
12080: 63
63 191
578
567
110
63
47(ост.) 63*191+47=12033+47=12080
66500: 3200
6400 20
2500(ост.) 3200*20+2500=64000+2500=66500
65306: 121
605 539
480
363
1176
1089
87(ост.) 121*539+87=65219+87=65306
2x + 4x = 12/18
6x = 2/3
x = 2/3 ÷ 6
x = 2/3 × 1/6
x = 1/9