Question

Пожалуйста распишите эти уравнения
1)х3=2х+1
2)0.4х+2=х3
3)2х3=-3х
4)-1.2х-1=х3

Answer 1

$3x = 2x + 1 \ x = 1$
$0.4x + 2 = 3x \ 2.6x = 2 \ x = frac{2}{2.6} = frac{20}{26} = frac{10}{13}$
$2 times x times 3 = - 3x \ 6x + 3x = 0 \ 9x = 0 \ x = 0$
$- 1.2x - 1 = x times 3 \ 3x + 1.2x = - 1 \ 4.2x = - 1 \ x = frac{ - 1}{4.2} = frac{ - 10}{42} = - frac{5}{21}$