a=13/20 b=3/2 c -7/8 d -17/12 e 11/10 nha giúp bạn hok tôt 

\(\text{a)}x-\frac{1}{4}=\frac{2}{5}\)

    \(x\)        \(=\frac{2}{5}+\frac{1}{4}\)

   \(x\)          \(=\frac{13}{20}\)

\(\text{b)}\frac{4}{3}-x=\frac{-1}{6}\)

                \(x=\frac{4}{3}+\frac{1}{6}\)

                \(x=\frac{3}{2}\)

\(\text{c)}2x+\frac{1}{4}=\frac{-3}{2}\)

   \(2x\)         \(=\frac{-3}{2}+\frac{-1}{4}=\frac{-7}{4}\)

     \(x\)         \(=\frac{-7}{8}\)

\(\text{d)}\frac{-5}{3}-2:x=\frac{7}{6}\)

                    \(2:x=\frac{-5}{3}+\frac{-7}{6}=\frac{-17}{6}\)

                        \(x=\frac{-12}{17}\)

e)\(\left(1-2x\right).\frac{1}{3}=\frac{-2}{5}\)

    \(\left(1-2x\right)\)   \(=\frac{-2}{5}.3=\frac{-6}{5}\)

                \(2x\)       \(=1+\frac{6}{5}\frac{11}{5}\)

                  \(x\)        \(=\frac{11}{5}.\frac{1}{2}=\frac{11}{10}\)

\(\text{Hok tốt!}\)

\(\text{@Kaito Kid}\)

a) (-10).x+30=10

<=>(-10).x=10-30

<=>(-10).x=-20

<=>x=(-20):(-10)

<=>x=2

Vậy x=2

b) x.(2x + 2) = 0

<=>\(\hept{\begin{cases}x=0\\2x+2=0\end{cases}}\)<=>\(\hept{\begin{cases}x=0\\2x=-2\end{cases}}\)<=>\(\hept{\begin{cases}x=0\\x=-1\end{cases}}\)

Vậy x=0 Hoặc x=-1

218.3 chia hết cho 3 nha

xong chua hihi haha

ko rảnh

TL :

\(x=1\)

HT

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