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)
$(12 frac{5}{13} + y) - 9 frac{9}{13} = 7 frac{7}{13} \ frac{161}{13} + y = frac{98}{13} + frac{126}{13} \ frac{161}{13} + y = frac{224}{13} \ y = frac{224}{13} - frac{161}{13} \ y = frac{63}{13} \ y = 4 frac{11}{13}$

Answer 2

спааасибо