Question

Помогите !!!даю 50 балов

Answer 1

$5\dfrac9{14}-2\dfrac37+6.7=5\dfrac9{14}-2\dfrac6{14}+6\dfrac7{10}=3\dfrac3{14}+6\dfrac7{10}=3\dfrac{15}{70}+6\dfrac{49}{70}=9\dfrac{64}{70}$

$9\dfrac{64}{70}=9\dfrac{32}{35}$