Skip to content / Đến nội dung
ThichHocToan.com

HKIMO 2019 Grade 7 National Final (Heat) Set 02 Question 4

HKIMO · HKIMO 2019 Grade 7 National Final (Heat) Set 02

Question 4

$A:B=1:3$, $B:C=4:3$, $C:D=4:5$, and $A+B+C+D=870$. Find $A$.