2/x-(x-6y)/6xy=(12y-x+6y)/6xy=(18y-x)/6xy
x=4√2 y=1/9
(18*1/9-4√2):6*4√2*1/9=(2-4√2):8√2/3=2(1-2√2)*3/8√2=3(1-2√2)/4√2=
3√2(1-2√2)/8=(3√2-12)/8
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Решение на фото.
По формуле cosx-cosy=-2sin((x+y)/2))*sin((x-y)/2))
<span>x+0,5y=-2,
</span>0,5y=-x-2,
y=-2x-4.
k=-2, m=-4.