\(\frac{23}{99}=\frac{23.1010101}{99.1010101}=\frac{23232323}{99999999}\)
\(\frac{23}{99}=\frac{23.101}{99.101}=\frac{2323}{9999}\)
\(\frac{23}{99}=\frac{23.10101}{99.10101}=\frac{232323}{999999}\)
Có \(2x+3y\vdots17\)
Nên \(8x+12y\vdots17\)
Mà \(17x+17y\vdots17\)
Trừ đi ta đc \(9x+5y\vdots17\)