Nguyễn Thị Bích Liễu
Giới thiệu về bản thân
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2025-04-04 21:34:36
a) \(\frac{x}{6} = \frac{- 3}{4}\)
\(x = \frac{\left(\right. - 3 \left.\right) . 6}{4}\)
\(x = \frac{- 9}{2}\)
Vậy \(x = \frac{- 9}{2}\).
b) \(\frac{5}{x} = \frac{15}{- 20}\)
\(x = \frac{5. \left(\right. - 20 \left.\right)}{15}\)
\(x = \frac{- 20}{3}\)
Vậy \(x = \frac{- 20}{3}\).
c) \(3 \left(\right. x + 11 \left.\right) = 2 \left(\right. 14 - x \left.\right)\)
\(3 x + 33 = 28 - 2 x\)
\(3 x + 2 x = 28 - 33\)
\(5 x = - 5\)
\(x = - 1\)
Vậy \(x = - 1\).