Решите уравнение: (х-0,4):13/21=4 1/5:1 9/17

(х-4/10)÷13/21=21/5÷26/17 (х-4/10)÷13/21=21/5×17/26 х-4/10=21/5×17/26×13/21 х-4/10=17/10 х=17/10+4/10 х=21/10 х=2,1

[latex](x-0,4):\frac{13}{21} =4 \frac{1}{5}:1 \frac{9}{17} [/latex] [latex](x-0,4): \frac{13}{21}=\frac{21}{5}: \frac{26}{17} [/latex] [latex](x-0,4): \frac{13}{21}=\frac{21}{5}*\frac{17}{26} [/latex] [latex]x-0,4=\frac{21}{5}*\frac{17}{26} * \frac{13}{21} [/latex] [latex]x-0,4=\frac{1}{5}*\frac{17}{2} [/latex] [latex]x-0,4=\frac{17}{10} [/latex] [latex]x-0,4=1,7[/latex] x=1,7+0,4 x=2,1