Вы ввели
5*y + 4*x - 3/2 + 1/3 = 25/2 (3*x)/2 - 7*y/10 = -17/5
4*x - 3/2 + 5*y + 1/3 = 25/2 3*x 7*y --- - --- = -17/5 2 10
$$5 y + 4 x - \frac{3}{2} + \frac{1}{3} = \frac{25}{2}$$<br><br>$$\frac{3 x}{2} - \frac{7 y}{10} = - \frac{17}{5}$$