Question

Tìm x,biết:

    a)11/6= -x/5  

    b)4,25:8= -3,5:x

 

Answer 1

\(a,\frac{11}{6}=-\frac{x}{5}\)

\(\Leftrightarrow-x\times6=11\times5\)

\(\Leftrightarrow-6x=55\)

\(\Leftrightarrow x=55:\left(-6\right)\)

\(\Leftrightarrow x=-\frac{55}{6}\)

\(b,4,25:8=-3,5:x\)

\(\Leftrightarrow\frac{17}{32}=--\frac{7}{2}:x\)

\(\Leftrightarrow x=-\frac{7}{2}:\frac{17}{32}\)

\(\Leftrightarrow x=-\frac{112}{17}\)

Answer 2

a) \(\frac{11}{6}=\frac{-x}{5}\)

\(\Rightarrow\frac{55}{30}=\frac{\left(-x\right)\cdot6}{30}\)

\(\Rightarrow55=\left(-x\right)\cdot6\)

\(\Rightarrow-x=\frac{55}{6}\)

\(\Rightarrow x=-\frac{55}{6}\)

b) \(4,25:8=-3,5:x\)

\(\Rightarrow0,53125=-3,5:x\)

\(\Rightarrow x=-3,5:0,53125\)

\(\Rightarrow x=-6,5882...\)

Answer 3

a,=-55/6