Question

решите уравнения    7целых 5/21-у=6целых18/21

Answer 1

$7 frac{5}{21}-y=6 frac{18}{21}\ \ y= 7 frac{5}{21}- 6 frac{18}{21}\ \ y=frac{8}{21}$

Answer 2

у=$frac {18}{21} 7$ - $frac{18}{21} 6$
y=$frac{8}{21}$