Решите уравнение: 6 2/3 : (4/5 х+7)=4/9

Question

Решите уравнение: 6 2/3 : (4/5 х+7)=4/9

Answer 1

6 2/3 : (4/5х + 7) = 4/9
4/5х + 7 = 6 2/3 : 4/9 = 20/3 * 9/4 = (5*3)/(1*1) = 15
4/5х = 15 - 7 = 8
х = 8 : 4/5 = 8 * 5 : 4 = 10
х = 10

Answer 2

6 2/3:(4/5x+7)=4/9; 4/5х+7=20/3*9/4; 4/5х+7=15; 4/5х=15-7; 4/5х=8; Х=8/1*5/4; Х=10