Odpowiedzi

2010-01-24T11:55:29+01:00
-5a+b=1
3a+b=-6 /*(-1)

-5a+b=1
-3a-b=6
----------------
-8a=7
a= -⅞
2010-01-24T11:59:03+01:00
-5a+b=1 |*(-1) |*3
3a+b=-6 |*5

5a-b=-1
3a+b=-6

8a=-7 |:8
a=-⁷/₈

-15a+3b=3
15a+5b=-30

8b=-27|:8
b=-²⁷/₈
b=-3³/₈
2010-01-24T11:59:07+01:00
-5a+b=1 /*3
3a+b=-6 /*5

-15a+3b=3
15a+6b=-30
-------------------------
9b=-27 /:9
b=-3

3a+(-3)=-6
3a-3=-6
3a=-3 /:3
a=-1

a=-1
b=-3