Question

1)Tìm X,biết:

a,[ (250-25):15]:X=(450-60):130

 

b,390-(X-7)=169:13

 

c,X-6:2-(48-24):2:6-3=0

Mik mong mn viết rõ ràng cho mik vs ạ! đang cần gấp!!!!!!!!!!!!!!

Answer 1

Bài làm :

\(a,\left[\left(250-25\right):15\right]:x=\left(450-60\right):130\)

\(\Rightarrow\left(225:15\right):x=390:130\)

\(\Rightarrow15:x=3\)

\(\Rightarrow x=15:3\)

\(\Rightarrow x=5\)

\(b,390-\left(x-7\right)=169:13\)

\(\Rightarrow390-\left(x-7\right)=13\)

\(\Rightarrow x-7=390-13\)

\(\Rightarrow x-7=377\)

\(\Rightarrow x=377+7\)

\(\Rightarrow x=384\)

\(c,x-6:2-\left(48-24\right):2:6-3=0\)

\(\Rightarrow x-6:2-24:2:6=3\)

\(\Rightarrow x-3-2=3\)

\(\Rightarrow x=3+2+3\)

\(\Rightarrow x=8\)

Học tốt nhé

Answer 2

a) ((250-25):15):x=(450-60):130

(225:15):x=390:130

15:x=3

x=15:3=5

b) 390-(x-7)=169:13

390-x+7=13

x+7=390-13=377

x=377-7=370

c)x-6:2-(48-24):2:6-3=0

x-3-24:2:6-3=0

x-3-2-3=0

x-8=0

x=8

tk cho mk :>>