Вопрос в картинках...

Решите задачу:

$\left \{ {{4x-2y=4}(:2) \atop {2x+22y=25}} \right. =\ \textgreater \ \left \{ {{2x-y=2} \atop {2x+22y=25}} \right.=\ \textgreater \ 2x=2+y \\ 2+y+22y=25 \\ 23y=23 \\ y=1 \\ \\ 2x=2+1 \\ 2x=3 \\ x=3/2$

$\left \{ {{y-2x=2} \atop {5x^2-y=1}} \right.=\ \textgreater \ y=2+2x \\ 5x^2-(2+2x)=1 \\ 5x^2-2-2x=1 \\ 5x^2-2x-3=0 \\ D=4+ 60=64=8^2 \\ x_1=(2+8)/10=1 \\ x_2=(2-8)/10=- \frac{3}{5} \\ \\ y=2+2*1 \\ y_1=4 \\ y=2-2* \frac{3}{5}=2- \frac{6}{5} \\ y_2= \frac{4}{5}$