Пожалуйста решите уравнение
2×X×80=2×(250-10)

2*x*80=2*(250-10);
160x=2*240;
160x=480;
x=480:160;
x=3.

*х=3

2*80*x=500-20                                                                                                       160x=480                                                                                                               480/160=3                                                                                                           x=3