Ответ:
ответ (9;-2)
{х+3у=3
{х+у=7
{9+3×(-2)=3
{9-2=7
{ 3=3
{7=7
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Ответ:
ответ (9;-2)
{х+3у=3
{х+у=7
{9+3×(-2)=3
{9-2=7
{ 3=3
{7=7