`x : 4 / 7 = [-3] / 8`
`x = [-3] / 8 . 4 / 7`
`x = [-3] / [ 4 . 2 ] . 4 / 7`
`x = [-3] / 14`
Vậy `x = [-3] / 14`
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tìm x :a, x . dfrac{-5}{8} dfrac{15}{32} b, dfrac{3}{10} : x dfrac{-9}{20}c, dfrac{-1}{4} x + dfrac{4}{5} dfrac{3}{4} d, dfrac{-7}{8} + dfrac{2}{3} :x dfrac{3}{5} . dfrac{-5}{12}
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tìm x :
a, x . \(\dfrac{-5}{8}\) = \(\dfrac{15}{32}\) b, \(\dfrac{3}{10}\) : x =\(\dfrac{-9}{20}\)
c, \(\dfrac{-1}{4}\) x + \(\dfrac{4}{5}\) =\(\dfrac{3}{4}\) d, \(\dfrac{-7}{8}\) + \(\dfrac{2}{3}\) :x = \(\dfrac{3}{5}\) . \(\dfrac{-5}{12}\)
LL
31 tháng 12 2022 lúc 19:46
a) dfrac{-2}{15}times xdfrac{-2}{7} b) dfrac{7}{-5}times x-3 c) -dfrac{4}{9}xdfrac{1}{2} d) dfrac{8}{3}div xdfrac{-3}{8} e) xdivdfrac{3}{-4}-12 f) left(-1right)div xdfrac{-3}{7}+dfrac{4}{5} g)dfrac{4}{11}x-dfrac{1}{3}dfrac{2}{5} i) dfrac{-6}{7}-dfrac{1}{5}x-4j) dfrac{1}{2}+dfrac{2}{3}div7dfrac{-1}{3} k) dfrac{-5}{2}+xdiv7dfr...
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a) \(\dfrac{-2}{15}\times x=\dfrac{-2}{7}\) b) \(\dfrac{7}{-5}\times x=-3\) c) \(-\dfrac{4}{9}x=\dfrac{1}{2}\) d) \(\dfrac{8}{3}\div x=\dfrac{-3}{8}\)
e) \(x\div\dfrac{3}{-4}=-12\) f) \(\left(-1\right)\div x=\dfrac{-3}{7}+\dfrac{4}{5}\) g)\(\dfrac{4}{11}x-\dfrac{1}{3}=\dfrac{2}{5}\) i) \(\dfrac{-6}{7}-\dfrac{1}{5}x=-4\)
j) \(\dfrac{1}{2}+\dfrac{2}{3}\div7=\dfrac{-1}{3}\) k) \(\dfrac{-5}{2}+x\div7=\dfrac{-1}{3}\) L) \(\dfrac{-3}{2}-\dfrac{1}{4}\div x=-1\)
Tìm x ϵ Z, biết: dfrac{5}{17}+dfrac{-4}{9}+-dfrac{20}{31}+dfrac{12}{17}+dfrac{-11}{-31} dfrac{x}{9} ≤ dfrac{-3}{7}+dfrac{7}{15}+dfrac{4}{-7}+dfrac{8}{15}+dfrac{2}{3}
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Tìm x ϵ Z, biết:
\(\dfrac{5}{17}\)+\(\dfrac{-4}{9}\)+-\(\dfrac{20}{31}\)+\(\dfrac{12}{17}\)+\(\dfrac{-11}{-31}\)< \(\dfrac{x}{9}\) ≤ \(\dfrac{-3}{7}\)+\(\dfrac{7}{15}\)+\(\dfrac{4}{-7}\)+\(\dfrac{8}{15}\)+\(\dfrac{2}{3}\)
1/ (left(-dfrac{2}{3}right)^2 x dfrac{-9}{8} - 25% x dfrac{-16}{5} 2/ -1dfrac{2}{5} x 75% + dfrac{-7}{5} x 25% 3/ -2dfrac{3}{7} x (-125%) + dfrac{-17}{7} x 25% 4/ (-2)^3 x (dfrac{3}{4} x 0.25) : (2dfrac{1}{4} - 1dfrac{1}{6})
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1/ (\(\left(-\dfrac{2}{3}\right)\)\(^2\) x \(\dfrac{-9}{8}\) - 25% x \(\dfrac{-16}{5}\)
2/ -1\(\dfrac{2}{5}\) x 75% + \(\dfrac{-7}{5}\) x 25%
3/ -2\(\dfrac{3}{7}\) x (-125%) + \(\dfrac{-17}{7}\) x 25%
4/ (-2)\(^3\) x (\(\dfrac{3}{4}\) x 0.25) : (2\(\dfrac{1}{4}\) - 1\(\dfrac{1}{6}\))
NN
5 tháng 3 2022 lúc 14:55
tìm x
\(x-\dfrac{1}{2}=\dfrac{3}{4}\)
\(x+\dfrac{7}{8}=\dfrac{3}{4}\)
\(\dfrac{1}{2}.x-\dfrac{1}{4}=\dfrac{-1}{2}\)
\(\dfrac{1}{2}-\dfrac{5}{6}:x=\dfrac{2}{3}\)
a)dfrac{2}{3}x-1dfrac{3}{2}b)| 5x - dfrac{1}{2}| - dfrac{2}{7} 25%c)dfrac{x-3}{4}dfrac{16}{x-3}d)dfrac{-8}{13}+dfrac{7}{17}+dfrac{21}{31}x≤dfrac{-9}{14}+4+dfrac{5}{-14}(xϵZ)
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a)\(\dfrac{2}{3}\)x-1=\(\dfrac{3}{2}\)
b)| 5x - \(\dfrac{1}{2}\)| - \(\dfrac{2}{7}\)= 25%
c)\(\dfrac{x-3}{4}\)=\(\dfrac{16}{x-3}\)
d)\(\dfrac{-8}{13}\)+\(\dfrac{7}{17}+\dfrac{21}{31}\)<x≤\(\dfrac{-9}{14}\)+4+\(\dfrac{5}{-14}\)(xϵZ)
tìm x:
|x| - \(5\dfrac{3}{7}\)|x| - \(\dfrac{3}{4}\) = 2|x| + (\(-\dfrac{8}{7}\))
\(\dfrac{-15}{4}\) x 3\(\dfrac{1}{3}\)- \(1\dfrac{3}{4}\)+ \(\dfrac{7}{8}\)
Tìm x, biết:
a) x+\(\dfrac{1}{6}\)=\(\dfrac{-3}{8}\) b) \(2-\left(\dfrac{3}{4}-x\right)=\dfrac{7}{12}\)
c) \(\dfrac{1}{2}x\)+\(\dfrac{1}{8}x=\dfrac{3}{4}\) d) 75%-\(1\dfrac{1}{2}+0,5:\dfrac{5}{12}-\left(\dfrac{-1}{2}\right)^2\)
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) \(\dfrac{-X}{21}=\dfrac{20}{7}\)