Question

6 2/3:(4/5x+7)=4/9
Решите уравнение , /- дробь

Answer 1

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