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2010-01-25T16:22:00+01:00
3=-a+b
-2=4a+b

-a+b=3
4a+b=-2

b=3+a
4a+3+a=-2

b=3+a
5a+3=-2

b=3+a
5a=-5

b=3+a
a=-1

a=-1
b=3+(-1)

a=-1
b=2
1 5 1
2010-01-25T17:03:37+01:00
3 = -a + b | *(-1)
-2 = 4a + b

-3 = a - b
-2 = 4a + b

sumujemy stronami

-3 - 2 = a - b + 4a + b
-5 = 5a

a = -1
3 = -a + b
3 + a = b
b = 3 + (-1) = 3 - 1 = 2

a = -1
b = 2
1 5 1