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x/2-y/16=5,5 /*16
4x-5y=0
8x-y=88 /*5
4x-5y=0
40x+5y=440
(-5y i 5y się skreślają)
44x=440
x=10
8*10-y=88
-y=88-80
y=-8
b)x+y/3+y/5=-2 /*15
2x-y/3-3x/4=3/2 /*12
15x+5y+3y=-30
24x-4y-9x=18 /*(-1)
15x+8y=-30
-15x+47=-18
(15x i -15x się skreślają)
12y=-48 /:12
y=-4
15x =32-30
15x=2 /:15
X=7,5