Question

решите уравнение 13 1/7-а = 6 4/11+5 7/11

Answer 1

$13 \frac{1}{7}-a=6 \frac{4}{11}+5 \frac{7}{11} \\ \\ 13 \frac{1}{7}-a=11 \frac{4+7}{11} \\ \\13 \frac{1}{7}-a=12 \\ \\ a= 13 \frac{1}{7}-12 \\ \\ a= 1\frac{1}{7}$