\(\frac{2}{x}=\frac{-x}{\frac{8}{25}}\)
Những câu hỏi liên quan
a) \(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):\left(-16\frac{2}{3}\right)=0\)
b) \(\left(\frac{x}{3}-5\frac{1}{4}\right)^2-\frac{-2}{5}=1\frac{1}{25}\)
c) \(\frac{17-x}{12}=\frac{3}{17-x}\)
d) \(1\frac{1}{3}-25\%\left(x-\frac{8}{3}\right)+2x=1,6:\frac{3}{5}\)
tìm x biết : a,\(\frac{x}{-15}=\frac{-60}{x}\) ; b,\(\frac{-2}{x}=\frac{-x}{\frac{8}{25}}\)
a,\(\frac{x}{-15}=\frac{-60}{x}\)=\(x^2\)= [-15 ] . [60] = 900 \(\Rightarrow\)x = + 30
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a.
\(\frac{x}{-15}=\frac{-60}{x}=x^2=\left(-15\right):\left(60\right)=900\Rightarrow x=+30\)
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Đơn giản biểu thức: \(B=\frac{0,75-30\%+\frac{3}{7}+\frac{3}{13}}{2,75-2,2+1\frac{4}{7}+3\frac{2}{3}}\)
Nhanh tay!!!
Và tìm x: \(\frac{-2}{x}=\frac{-x}{8}=\frac{-x}{\frac{8}{25}}\)
Trả lời:
\(B=\frac{0,75-30\%+\frac{3}{7}+\frac{3}{13}}{2,75-2,2+1\frac{4}{7}+3\frac{2}{3}}\)
\(B=\frac{\frac{3}{4}-\frac{3}{10}+\frac{3}{7}+\frac{3}{13}}{\frac{11}{4}-\frac{11}{5}+\frac{11}{7}+\frac{11}{3}}\)
\(B=\frac{2019}{1820}\div\frac{2431}{420}\)
\(B=\frac{2019}{1820}\times\frac{420}{2431}\)
\(B=\frac{6057}{31603}\)
1) \(\frac{24}{-12}=\frac{x}{5}=\frac{-y}{3}\)Tìm x và y
2) \(\frac{1}{3}+\frac{-2}{5}+\frac{1}{6}+\frac{-5}{25}\le\frac{x}{10}< \frac{-3}{4}+\frac{4}{14}+\frac{-2}{8}+\frac{-3}{5}+\frac{5}{7}\)Tìm x
3) \(\frac{8.x+18}{2.x+6}\)Tìm x
Tìm x
a)\(5\frac{8}{17}:x+\left(-\frac{4}{17}\right):x+3\frac{1}{7}:17\frac{1}{3}=\frac{4}{11}\)
b)\(\left(x+\frac{1}{5}\right)^2+\frac{17}{25}=\frac{26}{25}\)
a)\(\frac{x-1}{x+5}=\frac{6}{7}\)
b)\(\frac{-2}{x}=\frac{-x}{\frac{8}{25}}\)
a) \(\frac{x-1}{x+5}=\frac{6}{7}\Rightarrow7\left(x-1\right)=6\left(x+5\right)\)
7x - 7 = 6x +30
7x-6x=30+7
x=37
b)\(\frac{-2}{x}=\frac{-x}{\frac{8}{25}}\Rightarrow-x^2=-\frac{16}{25}\)
x2=16/25
=> x = 4/5 hoặc x=-4/5
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Bài 1:Tìm x,biết
a) x-frac{20}{11.13}-frac{20}{13.15}-frac{20}{15.17}-...-frac{20}{53.55}frac{3}{11}
b)x+frac{15}{90.94}+frac{15}{94.98}+frac{15}{98.102}+...+frac{15}{146.150}frac{2}{3}
c)x-frac{1}{2}-frac{1}{6}-frac{1}{12}-frac{1}{20}-frac{1}{30}-frac{1}{42}-frac{1}{56}frac{5}{24}
d)8-frac{8-frac{8}{5}+frac{8}{25}-frac{8}{125}}{9-frac{9}{5}+frac{9}{25}-frac{9}{125}}:frac{161616}{151515}frac{4+frac{4}{73}-frac{4}{115}}{5+frac{5}{73}-frac{1}{23}}
Đọc tiếp
Bài 1:Tìm x,biết
a) \(x-\frac{20}{11.13}-\frac{20}{13.15}-\frac{20}{15.17}-...-\frac{20}{53.55}=\frac{3}{11}\)
b)\(x+\frac{15}{90.94}+\frac{15}{94.98}+\frac{15}{98.102}+...+\frac{15}{146.150}=\frac{2}{3}\)
c)\(x-\frac{1}{2}-\frac{1}{6}-\frac{1}{12}-\frac{1}{20}-\frac{1}{30}-\frac{1}{42}-\frac{1}{56}=\frac{5}{24}\)
d)\(8-\frac{8-\frac{8}{5}+\frac{8}{25}-\frac{8}{125}}{9-\frac{9}{5}+\frac{9}{25}-\frac{9}{125}}:\frac{161616}{151515}=\frac{4+\frac{4}{73}-\frac{4}{115}}{5+\frac{5}{73}-\frac{1}{23}}\)
a, Câu hỏi của Nguyễn Ánh Ngân - Toán lớp 6 - Học toán với OnlineMath
b, Câu hỏi của Vũ Xuân Hiếu - Toán lớp 6 | Học trực tuyến
c)
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tính x
\(\frac{-2}{x}=\frac{-x}{\frac{8}{25}}\)
Ta có: \(\frac{-2}{x}=\frac{-x}{\frac{8}{25}}\)
\(\Leftrightarrow x\cdot\left(-x\right)=-2\cdot\frac{8}{25}=\frac{-16}{25}\)
\(\Leftrightarrow-x^2=-\frac{16}{25}\)
\(\Leftrightarrow x^2=\frac{16}{25}\)
\(\Leftrightarrow x\in\left\{\frac{4}{5};\frac{-4}{5}\right\}\)
Vậy: \(x\in\left\{\frac{4}{5};\frac{-4}{5}\right\}\)
theo đề ta có
2 x 0,32 = -(x)2
<=>-(x)2 = 0,64
<=>-x = \(\sqrt{0,64}\)
<=> x = -\(\sqrt{0,64}\)
=> \(-2\times\frac{8}{25}=-x^2\)
=> \(-x^2=\frac{-16}{25}\)
=> \(x^2=\frac{16}{25}\)
=> \(x=\frac{4}{5}\)
Vậy \(x=\frac{4}{5}\)
a) \(1-\left(5\frac{3}{8}+x-7\frac{5}{24}\right):\left(-16\frac{2}{3}\right)=0\)0
b) \(\left(\frac{x}{3}-5\frac{1}{4}\right)^2-\frac{-2}{5}=1\frac{1}{25}\)
c) \(1\frac{1}{3}-25\%\left(x-\frac{8}{3}\right)+2x=1,6:\frac{3}{5}\)
Các bạn giúp mk với, nhanh nhé, mk cần gấp
Câu a có 1 số 0 to thôi nhé!