Ответ:
{2x-y=16. /•4
{3x+4y=13
{8x-4y=64
11x=77
x=77:11
x=7. 3•7+4y=13
21+4y=13
4y=13-21
4y=-8
y=-8:4
y=-2
ответ(7;-2)
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Ответ:
{2x-y=16. /•4
{3x+4y=13
{8x-4y=64
{3x+4y=13
11x=77
x=77:11
x=7. 3•7+4y=13
21+4y=13
4y=13-21
4y=-8
y=-8:4
y=-2
ответ(7;-2)