Odpowiedzi

2010-03-03T19:16:06+01:00
A.[x+3y=o
[y-x=4 /×3
{x+3y=0
{3x-3y=12
4x=12 /:4
x=3

b.{x-5y=-2
[2x+y=-4 /×5
{x-5y=-2
{10x+5y=20
11x=18 /:11
x=1,63

c. {x-3y=0
{x+y=-4 /×3
{x-3y=0
{3x+3y=-12
4x=-12/:4
x=-3

d. [x+y=-4 /×3
{2x-3y=2
{3x+3y=-12
{2x-3y=2
5x=-10 /:5
x=-2

e.{2x-y=-4 /×(-2)
[x-2y=7
{-4x+2y=8
{x-2y=7
-3x=15 /:(-3)
x=-5

f.{2x+y=3
{x-y=9 /×(-2)
{2x+y=3
{-2x+2y=-18
3y=-15 /:3
y=-5
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2010-03-03T19:16:21+01:00

4y=4
y=1

x+3=0
x=-3
y=1
---------------------------------
x=-2+5y
2(-2+5y)+y=-4

x=-2+5y
-4+10y+y=-4

11y=0
y=0
x=-2+0
x=-2
---------------------------------
x+3y=0
-x-y=4
2y=4
y=2
x+6=0
x=-6
-------------------------------
X+y=-4 / * (-2)
2x-3y=2

-2x-2y=8
2x-3y=2

-5y=10 /: (-5)
y=-2

x-2=-4
{x=-2
{y=-4
----------------------------------------
-4-2y=8
x+2y=7

-3x=15 /:-3
x=-5

2* -5 + y=-4
-10+y=-4

{x=-2
{y=-2
----------------------------------------
2x+y=3
x-y=9

3x=12 /:3
x=4

2*4+y=3

8+y=3

y=-5
x=4
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2010-03-03T19:21:40+01:00
Wybacz nie chcialo mi sie pisac ;p masz skan ;]
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