Question

4x = 3y, 7y = 5z và x - y = -46

Answer 1

đề bài nghĩa là sao hả bạn ????????????????
 

Answer 2

ta có: \(4x=3y\Rightarrow\frac{x}{3}=\frac{y}{4}\Rightarrow\frac{x}{15}=\frac{y}{20}.\)

\(7y=5z\Rightarrow\frac{y}{5}=\frac{z}{7}\Rightarrow\frac{y}{20}=\frac{z}{28}\)

\(\Rightarrow\frac{x}{15}=\frac{y}{20}=\frac{z}{28}\)

ADTCDTSBN

có: \(\frac{x}{15}=\frac{y}{20}=\frac{x-y}{15-20}=\frac{-46}{-5}=\frac{46}{5}\)

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Answer 3

ta có: \(4x=3y\Rightarrow\frac{x}{3}=\frac{y}{4}\Rightarrow\frac{x}{15}=\frac{y}{20}.\)

\(7y=5z\Rightarrow\frac{y}{5}=\frac{z}{7}\Rightarrow\frac{y}{20}=\frac{z}{28}\)

\(\Rightarrow\frac{x}{15}=\frac{y}{20}=\frac{z}{28}\)

ADTCDTSBN

có: \(\frac{x}{15}=\frac{y}{20}=\frac{x-y}{15-20}=\frac{-46}{-5}=\frac{46}{5}\)

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Answer 4

Đề: \(4x=3y;7y=5z\) và \(x-y+z=-46\). Tìm các số x,y,z