Aiutatemi a risolvere queste proporzioni >.<
1/2:x=x:1/8 7/27:x=x:7/3 32/25:x=x:1/2 (7/20+x):x=10/3:16/9 x
23/42+x)=8/25:14/15 x86/15-x)=405/41:9 (83/72-x):x=16/9:6/7
x:y=50:15 x-y=7
1/2:x=x:1/8 7/27:x=x:7/3 32/25:x=x:1/2 (7/20+x):x=10/3:16/9 x
23/42+x)=8/25:14/15 x86/15-x)=405/41:9 (83/72-x):x=16/9:6/7x:y=50:15 x-y=7