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9x+2y=3 /*5
14x-10y=44
45x+10y=15
---------------------
59x=59 /:59
x=1
7*1-5y=22
-5y=22-7
-5y=15 /:(-5)
y= -3
9x + 2y = 3 |*5
14x - 10y = 44
45x + 10y = 15
-------------------------dodajemy
59x = 59 |:59
x = 1
7*1 - 5y = 22
-5y = 22-7
-5y = 15 |:(-5)
y = -3