Question

20x=1,6x^2 решите уравнения

Answer 1

x(1.6x-20)=0

x1=0

x2=20/1.6=12.5

Answer 2

$20x = 1.6 {x}^{2} \\ \\ \\ 20x - 1.6 {x}^{2} = 0 \\ \\ - 1.6 {x}^{2} + 20x = 0 | \times ( - 1) \\ \\ 1.6 {x}^{2} - 20x = 0 \\ \\ x(1.6x - 20) = 0 \\ \\ 1):x = 0 \\ \\ 2) 1.6x - 20 = 0 \\ \\ 1.6x = 20 \\ \\ x= 20 \div 1.6 = 200 \div 16 \\ \\ x2 = \frac{25}{2}$

$otvet : x1 = 0. \: x2 = \frac{25}{2}$

Вот так надо решать и помогла