Question

[Nguyễn Đức Anh]

Tìm x thỏa mãn;

-3/7(x-7)-(-5/14)(2x-3)-15=7/-21

Answer 1

[châu văn trẩu]

kết quả là đéo biết 

k cho tao

Answer 2

[Trí Tiên]

\(-\frac{3}{7}\left(x-7\right)-\left(-\frac{5}{14}\right)\left(2x-3\right)-15=\frac{7}{-21}\)

\(\Leftrightarrow-\frac{3}{7}\left(x-7\right)+\frac{5}{14}\left(2x-3\right)=\frac{44}{3}\)

\(\Leftrightarrow-\frac{3}{7}x+3+\frac{5}{7}x-\frac{15}{14}=\frac{44}{3}\)

\(\Leftrightarrow x\left(-\frac{3}{7}+\frac{5}{7}\right)+3-\frac{15}{14}=\frac{44}{3}\)

\(\Leftrightarrow x\frac{2}{7}+3=\frac{661}{42}\)

\(\Leftrightarrow x\frac{2}{7}=\frac{535}{42}\Leftrightarrow x=\frac{535}{12}\)