\(x=\left\{\dfrac{1}{3};-\dfrac{1}{3}\right\}\)
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x2 - \(\dfrac{3}{7}.\dfrac{35}{27}=\dfrac{11}{9}\)
Tìm x, biết
(Bạn nào biết thì giải giúp mình nhé, lưu ý dấu . là dấu nhân)
Tìm x, biết:
a) -dfrac{5}{6} - x dfrac{2}{3}
b) dfrac{2}{3}x + dfrac{1}{2} dfrac{1}{10}
c) dfrac{2}{9} - dfrac{7}{8} . x dfrac{1}{3}
d) dfrac{4}{5} + dfrac{5}{7} : x dfrac{1}{6}
e) (dfrac{2}{5} - 1dfrac{2}{3}) : x - dfrac{3}{5} dfrac{2}{5}
f) 1 - (-dfrac{3}{4} + x) . 2dfrac{2}{3} 0
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(Bạn nào biết thì giải giúp mình nhé, lưu ý dấu "." là dấu nhân)
Tìm x, biết:
a) -\(\dfrac{5}{6}\) - x = \(\dfrac{2}{3}\)
b) \(\dfrac{2}{3}\)x + \(\dfrac{1}{2}\) = \(\dfrac{1}{10}\)
c) \(\dfrac{2}{9}\) - \(\dfrac{7}{8}\) . x = \(\dfrac{1}{3}\)
d) \(\dfrac{4}{5}\) + \(\dfrac{5}{7}\) : x = \(\dfrac{1}{6}\)
e) (\(\dfrac{2}{5}\) - \(1\dfrac{2}{3}\)) : x - \(\dfrac{3}{5}\) = \(\dfrac{2}{5}\)
f) 1 - (-\(\dfrac{3}{4}\) + x) . \(2\dfrac{2}{3}\) = 0
bài 1 tìm x
a. 5 - 3(x+4) = -1
b.(x-1) - (x+2) = 0
c.( \(\dfrac{1}{2}\) + x )-( \(\dfrac{1}{3}\) - x) = 0
d. 2x2 - 3 = 5
e. x(2x -1) = 0
g. \(\dfrac{1}{3}\) . x2 - \(\dfrac{1}{6}\)=\(\dfrac{7}{6}\)
Tìm x:
a) \(\dfrac{-x}{4}=\dfrac{-9}{x}\)
b) \(\dfrac{5}{9}+\dfrac{x}{-1}=\dfrac{-1}{3}\)
c) \(x:3\dfrac{1}{15}=1\dfrac{1}{2}\)
d) \(\dfrac{3x-1}{-5}=\dfrac{-5}{3x-1}\)
cho \(\dfrac{3}{x}\)=\(\dfrac{y}{12}\)=\(\dfrac{3}{4}\) thì giá trị của x và y là:
A.x =4;y =9 B.x =-4;y =-9 C.x =12;y =3 D.x =-12;y =-3
tìm x , biết:a) x : 4dfrac{1}{3} -2,5 b) dfrac{3}{5}x + dfrac{1}{4} dfrac{1}{10}c) 2dfrac{7}{9} - dfrac{12}{13}x dfrac{7}{9} d)dfrac{-2}{3}-dfrac{1}{3}left(2x-5right)dfrac{3}{2}
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tìm x , biết:
a) \(x\) : \(4\dfrac{1}{3}\) = -2,5 b) \(\dfrac{3}{5}x\) + \(\dfrac{1}{4}\) = \(\dfrac{1}{10}\)
c) \(2\dfrac{7}{9}\) \(-\) \(\dfrac{12}{13}x\) = \(\dfrac{7}{9}\) d)\(\dfrac{-2}{3}-\dfrac{1}{3}\)\(\left(2x-5\right)=\dfrac{3}{2}\)
\((\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{9}+\dfrac{1}{10})\times x=\dfrac{1}{9}+\dfrac{2}{8}+\dfrac{3}{7}+...+\dfrac{8}{2}+\dfrac{9}{1}\)
Tìm x, biết:
a) \(\left(3\dfrac{1}{2}-2.x\right).3\dfrac{1}{3}=7\dfrac{1}{3}\)
b) \(\dfrac{4}{9}.x=\dfrac{9}{8}-0,125\)
c) \(\dfrac{-X}{21}=\dfrac{20}{7}\)
b)\(\left(\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{9}+\dfrac{1}{10}\right)x=\dfrac{1}{9}+\dfrac{2}{8}+\dfrac{3}{7}+...+\dfrac{8}{2}+\dfrac{9}{1}\)