РЕШИТЕ УРАВНЕНИЯ!!! Х - 1 5/7 = 2 1/7 (12 5/13 + У) - 9 9/13= 7 7/13

Решите задачу:

$x-1 \frac{5}{7} =2 \frac{1}{7} \\ x=2 \frac{1}{7} +1 \frac{5}{7} \\ x=3 \frac{6}{7} \\ \\ (12 \frac{5}{13}+y)-9 \frac{9}{13} =7 \frac{7}{13} \\ 12 \frac{5}{13} +y=7 \frac{7}{13} +9 \frac{9}{13} \\ 12 \frac{5}{13} +y=16 \frac{16}{13} \\ y=16 \frac{16}{13} -12 \frac{5}{13} \\ y=4 \frac{11}{13}$