Rozwiąż układ równań:
x/5 = 1-2y/5 -2(y-2)
x+1 = 2(1-y)
x=1-2y-10y+20
x+2y=1
x=21-12y
21-12y+2y=1
21-10y=1
10y=20
y=2
x=-3
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x=1-2y-10y+20
x+2y=1
x=21-12y
21-12y+2y=1
x=21-12y
21-10y=1
x=21-12y
10y=20
y=2
x=-3