Ответ:
Объяснение:
{4х-у=12
{7х+2у=20
{у=4х-12
{7х+2у=20
{7х+8х-24=20
{15х=44 х=44/15 у=4*(44/15-3)=4*(-1/15)=-4/15
{8х-2у=24
15х=44
х=44/15
у=4х-12=4*(х-3)=-1/15
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Ответ:
Объяснение:
{4х-у=12
{7х+2у=20
{у=4х-12
{7х+2у=20
{у=4х-12
{7х+8х-24=20
{у=4х-12
{15х=44 х=44/15 у=4*(44/15-3)=4*(-1/15)=-4/15
{8х-2у=24
{7х+2у=20
15х=44
х=44/15
у=4х-12=4*(х-3)=-1/15