հանրահաշիվ

4x — 5y — 3 = 0
{3x − 2y − 11 = 0
{x = (5y + 3 )/4
3 * (5y + 3 )/4 -2y — 11 = 0
15y/4 + 9/4 — 2y — 11 = 0
7y/4 — 35/4 = 0
7y = 35
y = 5
3x — 2*5 — 11 = 0
x = 7

{ 2x + 4y − 6 = 0,
{ 3x − 2y − 25 = 0
2x = 6 — 4y
x = (6 — 4y) / 2 = (3 — 2y)
3 (3 — 2y) — 2y — 25 = 0
-8y — 16 = 0
8y = -16
y = -2
x = 3 — 2y = 3 — 2 * (-2) = 7