Question

5/6 +4/7 :2

1/2:x=2/5

2005x64

315315:315

ghi tất cả rõ ràng giúp mk nha mn

Answer 1

b:1/2:x=2/5

nên x=1/2:2/5=1/2x5/2=5/4

c: 2005x64=128320