Ответ: x=15 ; y=0,5

[tex]\left \{ {{ \frac{1}{3}x + \frac{1}{5}y = 5.1 } \atop { \frac{3}{5} x - 2y = 8}} \right. \\ \\ \left \{ {{ \frac{5x + 3y}{15} = 5.1 } \atop { \frac{3x - 10y}{5} = 8 }} \right. \\ \\ \left \{ {{5 x+ 3 y= 76.5 \: \:| \times 10} \atop {3x - 10y = 40 \: \:| \times 3 }} \right. \\ \\ \left \{ {{50x + 30y = 765} \atop {9x - 30y =120 }} \right. + \\ 59x = 885 \: \: \: \: \: \: \: \: \: x = 15[/tex]

И вместо х поставим 15

[tex]3x - 10y = 40 \\ 3 \times 15 - 10y = 40 \\ 45 - 10y = 40 \\ - 10y = - 5 \\ y = 0.5[/tex]

Verified answer

Ответ:

x=15 y=0,5

Объяснение:

{1/3x+1/5y=5,1

{3/5x-2y=8

{10x+6y=153

{3x-10y=40

{50x+30y=765

{9x-30y=120

59x=885

x=15

3*15-10y=40

y=0,5