Должно получиться 29/43

способ решения №1 [latex](2 \frac{2}{3}x+1 \frac{3}{7}x)*21=58 [/latex] [latex]( \frac{8}{3}x+ \frac{10}{7}x)*21=58[/latex] [latex]56x+30x=58[/latex] [latex]86x=58[/latex] [latex]x = \frac{58}{86} [/latex] [latex]x= \frac{29}{43} [/latex] способ решения №2 [latex](2 \frac{2}{3}x+1 \frac{3}{7}x)*21=58 [/latex] [latex]( \frac{8}{3}x+ \frac{10}{7}x)= \frac{58}{21} [/latex] [latex] \frac{56x+30x}{21} = \frac{58}{21} [/latex] [latex] \frac{86}{21}x= \frac{58}{21} [/latex] [latex]x = \frac{58}{21} : \frac{86}{21} [/latex] [latex]x = \frac{58}{21}* \frac{21}{86} [/latex] [latex]x= \frac{29}{43} [/latex]