1) 6(x+y)-5y=x+8 10x-7(y-x)=-y+46 2) 49y-31(x+y)=14-x - вопрос №16581074624931141314139037236 от wormer221 04.12.2020 15:31

Question

Математика: 1) 6(x+y)-5y=x+8 10x-7(y-x)=-y+46 2) 49y-31(x+y)=14-x 13(x-y)+14y=x+13

wormer221 · Answer

{6x-5y=43     {x=(43+5y)/6                   {x=(43+5y)/6              {x=(43+5y)/6 {4x+3y=73     {4*(43+5y)/6+3y=73         {(86+10y)+9y=219        {19y=133   {x=(43+5y)/6      {x=(43+35)/6=78/6=13  {y=7                                        {y=7 ответ:   x=13             y=7  {5x+10y=54     {x=(54-10y)/5   {x=10.8-2y                     {x=10.8-2y   {10x+5y=46,5   {10x+5y=46,5    {10(10.8-2y)+5y=46,5     {108+(-20+5)y=46,5    {x=10.8-2y      {x=10.8-2y  {x=10.8-8.2=2.6   {15y=61.5        {y=4.1         ...