tìm x
a) \(2\frac{2}{3}:x=1\frac{7}{9}:2\frac{2}{3}\)
\(-2^3+0,5x=1,5\)
Những câu hỏi liên quan
Tìm x,biết:
a)\(\frac{4}{7}-x=\frac{1}{3}\)
b)|x-5|=7
c)\(x-\frac{2}{3}=\frac{-6}{7}\)
d)\(\frac{x}{3}=\frac{8}{12}\)
e)\(\frac{2}{3}-1\frac{4}{15}x=\frac{-3}{5}\)
f)\(-2^3+0,5x=1,5\)
g)\(2^{x-1}=16\)
Help!!
a) x=4/7 - 1/3=19/21
b) /x-5/=7 -->x-5=7 hoặc x-5=-7
--> x=12 hoặc x= -2
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a,\(\frac{4}{7}-x=\frac{1}{3}\Rightarrow x=\frac{4}{7}-\frac{1}{3}\)
\(\Rightarrow x=\frac{12}{21}-\frac{7}{21}\Rightarrow x=\frac{5}{21}\)
b,\(\left|x-5\right|=7\Rightarrow\orbr{\begin{cases}x-5=7\\x-5=-7\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=12\\x=-2\end{cases}}\)
c,\(x-\frac{2}{3}=-\frac{6}{7}\Rightarrow x=-\frac{6}{7}+\frac{2}{3}\Rightarrow x=-\frac{4}{21}\)
d,\(\frac{x}{3}=\frac{8}{12}\Rightarrow x=8.3:12=2\)
e,\(\frac{2}{3}-1\frac{4}{15}x=-\frac{3}{5}\Rightarrow1\frac{4}{15}x=\frac{2}{3}+\frac{3}{5}\Rightarrow\frac{19}{15}x=\frac{19}{15}\Rightarrow x=1\)
f,\(-2^3+0,5x=1,5\Rightarrow-8+0,5x=1,5\Rightarrow0,5x=1,5+8\)
\(\Rightarrow0,5x=9,5\Rightarrow x=19\)
g,\(2^{x-1}=16\Rightarrow x-1=4\Rightarrow x=5\)
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Tìm x:
a)-23+0,5x=1,5
b)\(\frac{\left(-3\right)^x}{81}=-27\)
c)\(1\frac{1}{2}.x-4=0,5\)
d)\(1\frac{2}{3}:\frac{x}{4}=6:0,3\)
Tìm x:
a)-23+0,5x=1,5
-8+0,5x = 1,5
0,5x = 1,5-(-8) = 9,5
x = 9,5:0,5 = 19
b)(−3)x81=−27
(-3)x:81 =-27
(-3)x = -27.81 = -2187
(-3)x = (-3)7
=> x=7
c)112.x−4=0,5
1,5.x = 0,5+4 = 4,5
x = 4,5:1,5 = 3
d)123:x4=6:0,3
\(\frac{5}{3}\):\(\frac{x}{4}\) = 20
\(\frac{x}{4}\) = \(\frac{5}{3}\):20 = \(\frac{1}{12}\)
=> x:4 = \(\frac{1}{12}\)
x = \(\frac{1}{12}\).4 = \(\frac{1}{3}\)
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tìm x :
0,5x - 3/2x = 3\(0,5x-\frac{3}{2}x=\frac{2}{7}\)
\(\frac{2}{3}-1\frac{4}{15}x=\frac{-3}{5}\)
-23+0,5x=1,5
\(\frac{2}{3}-1\frac{4}{15}x=\frac{-3}{5}\)
\(1\frac{4}{15}x=\frac{19}{15}\)
\(x=1\)
- 2 3 + 0,5 x = 1,5
- 8 + 0,5 x = 1,5
0,5 x = 9,5
x = 19
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tìm x:
a,\(\frac{x}{2\times5}+\frac{x}{5\times8}+\frac{x}{8\times11}+\frac{x}{11\times14}=\frac{3}{7}\)
b, \(50\%+\frac{2}{3}x=x+4\)
c,\(0,5x-\frac{2}{3}\left(x+1\right)=\frac{-1}{12}\)
d,\(\frac{1}{2}\left(x-\frac{2}{3}\right)-\frac{2}{5}\left(2-x\right)=\frac{1}{9}\)
1/M=(\(\frac{0,4-\frac{2}{9}+\frac{2}{11}}{1,4-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-0,25+1,5}{1\frac{1}{6}-0,875+0,7}\)) :\(\frac{2012}{2013}\)
2/ Tìm x, biết:\(|x^2+|x-1||=x^2+2|\)
Câu 2 đây:
\(|x^2+|x-1||=x^2+2\)
\(\Rightarrow\orbr{\begin{cases}x^2+\left|x-1\right|=x^2+2\\x^2+\left|x-1\right|=-x^2-2\left(l\right)\end{cases}}\)
\(\Rightarrow\left|x-1\right|=2\Leftrightarrow\orbr{\begin{cases}x=3\\x=-1\end{cases}}\)
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a) \(M=\left(\frac{0,4-\frac{2}{9}+\frac{2}{11}}{1,4-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-0,25+0,5}{1\frac{1}{6}-0,875+0,7}\right):\frac{2012}{2013}\)
\(=\left(\frac{\frac{2}{5}-\frac{2}{9}+\frac{2}{11}}{\frac{7}{5}-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-\frac{1}{4}+\frac{1}{2}}{\frac{7}{6}-\frac{7}{8}+\frac{7}{10}}\right):\frac{2012}{2013}\)
\(=\left(\frac{2\left(\frac{1}{5}-\frac{1}{9}+\frac{1}{11}\right)}{7\left(\frac{1}{5}-\frac{1}{9}+\frac{1}{11}\right)}-\frac{2\left(\frac{1}{6}-\frac{1}{8}+\frac{1}{10}\right)}{7\left(\frac{1}{6}-\frac{1}{8}+\frac{1}{10}\right)}\right):\frac{2012}{2013}\)
\(=\left(\frac{2}{7}-\frac{2}{7}\right):\frac{2012}{2013}\)
\(=0\)
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tìm x:
\(\left|x\right|-5\frac{3}{7}\times\left|x\right|-\frac{3}{4}=2\times\left|x\right|+\frac{-15}{2}\)
\(50\%+\frac{2}{3}x=x+4\)
\(0,5x-\frac{2}{3}\left(x+1\right)=\frac{-1}{12}\)
\(\frac{1}{2}\left(x-\frac{2}{3}\right)-\frac{2}{5}\left(2-x\right)=\frac{1}{9}\)
Tìm x:
A. 0,5x - \(\frac{1}{3}\) x =\(\frac{1}{3}\)
B. x: \(3\frac{1}{2}\) = -1,5
C. 1,5x = \(\frac{11}{5}\)
a. \(0,5x-\frac{1}{3}x=\frac{1}{3}\)
\(\left(0,5-\frac{1}{3}\right)x=\frac{1}{3}\)
\(\frac{1}{6}x=\frac{1}{3}\)
\(x=\frac{1}{3}:\frac{1}{6}\)
\(x=2\)
b. \(x:3\frac{1}{2}=-1,5\)
\(x=-1,5\times3\frac{1}{2}\)
\(x=-5,25\)
c. \(1,5x=\frac{11}{5}\)
\(x=\frac{22}{15}\)
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A. 0,5x - 1/3x = 1/3
(0,5 - 1/3)x = 1/3
1/6x = 1/3
x = 2
B. x : 3 1/2 = -1,5
x = -1,5 x 3 1/2
x = -5,25
C. 1,5x = 11/5
x = 22/15
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Giải phương trình:a, 5x+ 3,48- 2,35x 5,38- 2,9x+ 10,42b,frac{7}{8}x-5left(x-9right)frac{20x+1,5}{6}c,frac{x}{3}-frac{2x+1}{6}frac{x}{6}-xd,frac{2+x}{5}-0,5xfrac{1-2x}{4}+0,25e,frac{3x-11}{11}-frac{x}{3}frac{3x-5}{7}-frac{5x-3}{9}f,frac{9x-0,7}{4}-frac{5x-1,5}{7}frac{7x-1,1}{6}-frac{5left(0,4-2xright)}{6}Giups mình với nhé
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Giải phương trình:
a, 5x+ 3,48- 2,35x= 5,38- 2,9x+ 10,42
b,\(\frac{7}{8}x-5\left(x-9\right)=\frac{20x+1,5}{6}\)
c,\(\frac{x}{3}-\frac{2x+1}{6}=\frac{x}{6}-x\)
d,\(\frac{2+x}{5}-0,5x=\frac{1-2x}{4}+0,25\)
e,\(\frac{3x-11}{11}-\frac{x}{3}=\frac{3x-5}{7}-\frac{5x-3}{9}\)
f,\(\frac{9x-0,7}{4}-\frac{5x-1,5}{7}=\frac{7x-1,1}{6}-\frac{5\left(0,4-2x\right)}{6}\)
Giups mình với nhé