Question

[Nga Phan]

3:\(x\) +\(\frac{7}{10}\) =\(\frac13\) x2

Answer 1

[Nguyễn Thị Thương Hoài]

3 : \(x\) + \(\frac{7}{10}\) = \(\frac13\) x 2

3 : \(x\) + \(\frac{7}{10}\) = \(\frac23\)

3 : \(x\) = \(\frac23-\frac{7}{10}\)

3 : \(x\) = \(\frac{20}{30}\) - \(\frac{21}{10}\)

3 : \(x\) = - \(\frac{1}{30}\)

\(x\) = 3 : (- \(\frac{1}{30}\))

\(x\) = 3 x (-30)

Vậy \(x\) = - 90

Answer 2

[vh ng]

\(3:x+\frac{7}{10}=\frac13\times2\)

\(3:x+\frac{7}{10}=\frac23\)

\(3:x=\frac23-\frac{7}{10}\)

\(3:x=\frac{20}{10}-\frac{7}{10}\)

\(3:x=-\frac{1}{30}\)

\(x=3:\left(-\frac{1}{30}\right)\)

Vậy \(x=\) -90