Question

упростите выражение
а) -2/3*(6/7-у)+(2/7+у)
б)1/9*(3/5-х)-(х-1/15)

Answer 1

$- frac{2}{3} * (-frac{6}{7}-y)+(frac{2}{7}+y) = frac{4}{7}+frac{2}{3}y+frac{2}{7}+y \ \ frac{1}{9}*(frac{3}{5}-x) - (x-frac{1}{15}) = frac{1}{15} - frac{1}{9}x-x+ frac{1}{15} = frac{2}{15}-frac{10}{9}x$