6 2/3:(4/5x+7)=4/9 Решите уравнение , /- дробь
20/3 ÷ 4/9 = 4/5х + 7 20/3 · 9/4 - 7 = 4/5х (20·9)/(3·4) - 7 = 4/5х 15 - 7 = 4/5х 8 = 4/5х х = 8 ÷ 4/5 х = 8 · 5/4 х = 10