Наверное так.................................
2x - 21 + 6x = 3
8x = 24
x = 3
12 - x = 20 - 10x + 10
9x = 20 - 12 + 10
9x = 18
x = 2
Ответ:
(0,2)^-3 > (0,5)^-3.
Объяснение:
(0,2)^(-3) и (0,5)^(-3)
1. (0,2)^(-3) = (1/5)^(-3) = (5/1)^3 = 5^3 = 125;
2. (0,5)^(-3) = (1/2)^(-3) = (2/1)^3 = 2^3 = 8.
3. 125 > 8.