Question

Упростите выражение 2/7y +5/14y -10/21y y=1.2

Answer 1

$\frac{2}{7}y+ \frac{5}{14}y- \frac{10}{21} y;y=1,2\\ \\ \frac{4}{14}y+ \frac{5}{14}y- \frac{10}{21} y;y=1,2\\ \\ \frac{9}{14}y- \frac{10}{21} y;y=1,2\\ \\ \frac{27}{42}y- \frac{20}{42} y;y=1,2\\ \\ \frac{7}{42}y;y=1,2\\ \\ \frac{1}{6}*1,2= \frac{1}{5}$