Đáp án:
`x=1`
Giải thích các bước giải:
`x-8/25=8/9 xx 15/16 xx ... xx 2499/2500`
`to x-8/25=(8xx15xx...xx2499)/(9xx16xx...xx2500)`
`to x-8/25=(2xx4xx3xx5xx...xx49xx51)/(3xx3xx4xx4xx...xx50xx50)`
`to x-8/25=(2xx3xx....xx49)/(3xx4xx...xx50) xx (4xx5xx...xx51)/(3xx4xx...xx50)`
`to x-8/25=2/50 xx 51/3`
`to x-8/25=17/25`
`to x=17/25+8/25=1`
Vậy `x=1`