Question

Tìm x biết:

\(\frac{25-x}{56}\)=\(\frac{6}{16}\)

Answer 1

\(\frac{25-x}{56}=\frac{6}{16}\)

\(\Rightarrow\frac{25-x}{56}=\frac{3}{8}\)

\(\Rightarrow\left(25-x\right).8=56.3\)

\(\Rightarrow25.8-8x=168\)

\(\Rightarrow200-8x=168\)

\(\Rightarrow8x=200-168\)

\(\Rightarrow8x=32\)

\(\Rightarrow x=32:8\)

\(\Rightarrow x=4\)

Tham khảo nha !!! 

Answer 2

Cách này dễ hơn nèk : 

\(\frac{25-x}{56}=\frac{6}{16}\)

\(\Leftrightarrow\)\(\frac{25-x}{56}=\frac{3}{8}\)

\(\Leftrightarrow\)\(\frac{25-x}{56}=\frac{21}{56}\)

\(\Leftrightarrow\)\(25-x=21\)

\(\Leftrightarrow\)\(x=25-21\)

\(\Leftrightarrow\)\(x=4\)

Vậy \(x=4\)

Chúc bạn học tốt ~ 

Answer 3

Nhân chéo là ra mà

56 x 6 = 25 - X x16

=56 x 6 : 16 = 21

25 - 21 = 4

Vậy X bằng 4

Answer 4

(25-x)*16=6*56

nên (25-x)*16=336 

25-x=336/16=21

x=25-21=4