Ответ:
{5х+2y=25
{3x+4y=29
{x=5-2/5y
{3(5-2/5y)+4y=29. -> 15-6/5y+4y=29
15+14/5y=29*5
{x=5-2/5*5 75+14y=145
{y=5 14y=145-75
14y=70
{x=5-2 y=5
{y=5
{x=3
Ответ: (3;5)
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Ответ:
{5х+2y=25
{3x+4y=29
{x=5-2/5y
{3(5-2/5y)+4y=29. -> 15-6/5y+4y=29
15+14/5y=29*5
{x=5-2/5*5 75+14y=145
{y=5 14y=145-75
14y=70
{x=5-2 y=5
{y=5
{x=3
{y=5
Ответ: (3;5)