Question

[Thao Hoa Nguyen]

Tim x biet :

a, 0,5x - \(\frac{2}{3}\)x = \(\frac{7}{12}\)                           b, \(\left(\frac{3x}{7}+1\right):\left(-4\right)=\frac{-1}{28}\)

Answer 1

[Tiểu Sam Sam]

a) \(\left(0,5-\frac{2}{3}\right)\cdot x=\frac{7}{12}\)

\(\left(\frac{1}{2}-\frac{2}{3}\right)\cdot x=\frac{7}{12}\)

\(\frac{-1}{6}\cdot x=\frac{7}{12}\)

\(x=\frac{7}{12}:\frac{-1}{6}\)

\(x=\frac{7}{12}\cdot\frac{-6}{1}\)

\(x=\frac{-7}{2}\)