Question

Решите пропорцию: 1 19/20÷(x+4)=2 1/6÷2 2/9

Answer 1

2 1/6*(х+4)=2 2/9*19/20
13/6х+26/3=20/9*19/20
13/6х=19/9-26/3
13/6х=19/9-78/9
13/6х=-59/9
Х=-59/9:13/6=-59/9*6/13
Х=-118/39=-3 1/39

Answer 2

2 1/6*(х+4)=2 2/9*19/20
13/6х+26/3=20/9*19/20
13/6х=19/9-26/3
13/6х=19/9-78/9
13/6х=-59/9
Х=-59/9:13/6=-59/9*6/13
Х=-118/39=-3 1/39