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-6x+4y=2
5y = 10 /:5
y= 2
6x+y=8
6x + 2 = 8
6x = 6 / : 6
x=1
y=2
teraz podstaw po y:
6x+2=8
6x=8-2
6x=6 /:6
x=1
+ -6x+4y=2
------------------------
5y = 10 / 5 (obustronnie)
y = 2
6x +2 = 8
y = 2
6x = 6/ 6
y = 2
x = 1