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y - bilet ulgowy
3x + 2y = 26
1x + 4y = 22 I *3
3x+ 2y = 26
3x + 12y = 66
10y = 40
y=4 zł to x = 22 - 4y = 22 - 16 = 6zł
spr
3*6 + 2*4 = 18 + 8 = 26 zł
1*6 + 4*4 = 6 + 16 = 22 zł
y - bilet ulgowy
3x+2y = 26
x+4y=22
3(22-4y) +2y=26
x=22-4y
y=4
x=6