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10x=12,(2)
10x-x=10,(2)-1,(2)
9x=11 /:9
x=11/9
=========
x=2,3(15)
10x=23,(15)
1000x=2315,(15)
1000x-10x=2315,(15)-23(15)
990x=2292 /:990
x=2292/9900
x=382/165