6) 5(1 + 2x) - (2x - 1) = 7
5 + 10x - 2x + 1 = 7
10x - 2x = 7 - 5 - 1
8x = 1
x = 1 : 8 = 0,125
7) 11(1 - 2x) - 8(3x - 5) = 1 + 4x
11 - 22x - 24x + 40 = 1 + 4x
- 22x - 24x - 4x = 1 - 11 - 40
- 50x = - 50
x = - 50 : (- 50) = 1
Пользуйтесь)))))))))))))))))))))))))))))))))
(t+11)^3 - 4^3 = (t + 11 - 4)((t+11)^2 + 4(t+11) + 16) = (t + 7)(t^2 + 26t + 181)
(2* 10^2)^3 * 3 * 10^(-5) =
= 2^3 * 10^6 * 3 * 10^(-5) =
= 8 * 3 * 10^6 * 10^(-5) =
= 24 * 10^(6 - 5) =
= 24 * 10 =
= 240.