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2010-04-11T13:02:23+02:00
3x+5y=2 /*2
-2x-3y=4 /*3

6x+10y=4
-6x-9y=12
_________
y=16

3x+5*16=2
3x+80=2
3x=-78
x=-26

x=-26
y=16
2010-04-11T13:05:34+02:00
3x+5y=2 |*(-2)
-2x-3y=4 |*(-3)

-6x-10y = -4
6x+9y = -12

-10y+9y = -4-12
-y = -16 |*(-1)
y = 16

3x+5*16 = 2
3x+80 = 2
3x = 2-80
3x = -78 |:3
x = -26

x = -26
y = 16
2010-04-11T13:53:40+02:00
{3x + 5y = 2 /x(-2)
{-2x - 3y = 4 /x(-3)

{-6x - 10y = -4
{6x + 9y = -12

{-10y + 9y = -4 - 12
{6x + 9y = -12

{-y = -16 /x(-1)
{6x + 9y = -12

{y = 16
{6x + 9 x 16 = -12

{y = 16
{6x = -156 /:6

{y = 16
{x = -26