Решите уравнения со смешанными числами: А)1 5/7+x=4 8/21 Б)y-8/10=2/7

[latex]1 \frac{5}{7}+x=4\frac{8}{21} \\\\ \frac{12}{7}+x=\frac{92}{21}\\\\x=\frac{92}{21}-\frac{12}{7}\\\\x=\frac{92-12\cdot 3}{21}=\frac{56}{21}=2\frac{14} {21}=2\frac{2}{3} [/latex] [latex]y-\frac{8}{10}=\frac{2}{7}\\\\y-\frac{4}{5}=\frac{2}{7}\\\\y=\frac{2}{7}+\frac{4}{5}=\frac{10+28}{35}=\frac{38}{35}=1\frac{3}{35}[/latex]