Question

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

Answer 1

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