Question

1 phan 4 :(x phan 4 + (-2) phan 7 + 2 phan 8)=(-1) phan 14

Answer 1

\(\frac{1}{4}:\left(\frac{x}{4}+\frac{\left(-2\right)}{7}+\frac{2}{8}\right)=\frac{\left(-1\right)}{14}\)

\(\frac{1}{4}:\left(\frac{x}{4}+\frac{\left(-1\right)}{28}\right)=\frac{\left(-1\right)}{14}\)

\(\frac{x}{4}+\frac{\left(-1\right)}{28}=\frac{1}{4}:\frac{\left(-1\right)}{14}\)

\(\frac{x}{4}+\frac{\left(-1\right)}{28}=\frac{-7}{2}\)

\(\frac{x}{4}=\frac{-7}{2}-\frac{\left(-1\right)}{28}\)

\(\frac{x}{4}=\frac{-97}{28}\)

\(\frac{7x}{28}=\frac{-97}{28}\)

\(\Rightarrow7x=-97\)

\(\Rightarrow x=-97:7\)

\(\Rightarrow x=\frac{-97}{7}\)

Váy \(x=\frac{-97}{7}\)

Nhớ k cho mk nha  Le Ha Trang