Odpowiedzi

2010-04-09T20:49:08+02:00
{4x+5y=-4 /×3
{6x+7y=-6 /×(-2)
{12x+15y=-12
{-12x-14y=12
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y=0

{y=0
{4x+5y=-4
{y=0
{4x+0=-4 /÷4
{y=0
{x=-1


{2x-11y=73 /×3
{3x-4y=47 /×(-2)
{6x-33y=219
{-6x+8y=-94
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-25y=125 /÷25
y=5

{y=5
{3x-4y=47
{y=5
{3x-4×5=47
{y=5
{3x-20=47
{y=5
{3x=37+20
{y=5
{3x=57 /÷3
{y=5
{x=19


2010-04-09T20:51:08+02:00
{4x+5y=-4 |*(-3)
{6x+7y=-6 |*2

{-12x-15y=12
{12+14y=-12
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y=0
12x+14*0=-12
12x=-12 |/12
x=-1

{x=-1
{y=0


{2x-11y=73|*-3
{3x-4y=47|*2

{-6+33=-219
{6x-8y=94
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25y=-125|\25
y=-5

6x-8*(-5)=94
6x+40=94|-40
6x=54|\6
x=9

{x=9
{y=-5




2010-04-09T21:14:23+02:00
{4x+5y= -4 | *(-1½)
{6x+7y= -6

{-6x-7,5y=6
{6x+7y= -6
0,5y= 0 | / 0,5
y= 0

4x+5*0= -4
4x= -4 | /4
x= -1


Sprawdzenie: 4*(-1)+5*0= -4
6*(-1)+ 7*0= -6