решите систему уравнений графическим способом:
1) {x-2y=-1,
{2x+y=3;
2) {x-y=8,
{x+y=-3;
3) {3x+4y=2,
{5x-2y=-1;
4) {2x-3y=4,
{-x+1,5y=-2.
1) {x-2y=-1,
{2x+y=3;
2) {x-y=8,
{x+y=-3;
3) {3x+4y=2,
{5x-2y=-1;
4) {2x-3y=4,
{-x+1,5y=-2.
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