Question

2) 1/14y + 8/21y - 3/35y, если y =1 1/11

Answer 1

$\frac{1}{14} y + \frac{8}{21} y - \frac{3}{35} y = \frac{15}{210} y + \frac{8 \times 10}{210} y - \frac{3 \times 6}{210} y = \frac{15 + 80 - 18}{210} y = \frac{77}{210} y = \frac{11}{30} y$
$\frac{11}{30} y = \frac{11}{30} \times 1 \frac{1}{11} = \frac{11}{30} \times \frac{12}{11} = \frac{12}{30} = \frac{2}{5} = 0.4$