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{7x+5y=6 | * 4
{ -25 x - 20y = - 20
{ 28 x + 20 y = 24 { y się skraca
- 25 x + 28x = - 20 + 24
3 x = 4 |: 3
x = 3/4
5x+4y=4
5x + 4 * 3/4= 4
5x + 3 = 4
5 y = 1 |: 5
{ y = 1/5
{ x = 3/4
{7x+5y=6 /*4
-25x-20y=-20
28x+20y=24
3x=4
x=4/3= 1 i 1/3
y=-2/3
{7x+5y=6 /× 4
{-25x-20y=-20
{28x+20y=24
+------------------
3x=4 /:3
x=¾
5x+4y=4
5×¾ +4y=4
15/4 + 4y=4
4y=4-15/4
4y=¼ /:4
y=¹/₁₆
{x=¾
{y=¹/₁₆