Question

Помогите умоляю..................

Answer 1

1)
$(x - 3 \frac{13}{21} ) + 2 \frac{10}{21} = 7 \frac{2}{21} \\ x - \frac{76}{21} = \frac{149}{21} - \frac{52}{21} \\ x - \frac{76}{21} = \frac{97}{21} \\ x = \frac{97}{21} + \frac{76}{21} \\ x = \frac{173}{21} \\ x = 8 \frac{5}{21}$
2)
$(12 \frac{5}{13} + y) - 9 \frac{9}{13} = 7 \frac{7}{13} \\ \frac{161}{13} + y = \frac{98}{13} + \frac{126}{13} \\ \frac{161}{13} + y = \frac{224}{13} \\ y = \frac{224}{13} - \frac{161}{13} \\ y = \frac{63}{13} \\ y = 4 \frac{11}{13}$