TH1: x = 29/12
TH2: x = -13/12
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1. tìm x biết:
a, \(\left(\frac{2}{3}+x\right)\frac{1}{2}-\frac{1}{3}x=\frac{5}{4}\)
b,\(\left|x+\frac{1}{2}\right|+\frac{1}{2}=\left|\frac{2}{3}-\frac{5}{4}\right|\)
c,\(\left(x+\frac{2}{3}\right)^2.\frac{1}{2}=1\frac{1}{2}\)
Tìm x thuộc Z, biết:
\(\frac{4}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)
Tìm x biết :
a)\(\frac{2}{3}x-50\%x-\left(-\frac{4}{5}\right):1\frac{3}{5}=-0,12\)\(+1\frac{3}{25}\)
b)\(\left(-1\frac{1}{6}+\frac{2}{3}-\frac{3}{4}\right):x+\left(-1\frac{11}{12}\right).1\frac{21}{23}=-6\frac{1}{3}\)
c)\(50\%x-\frac{1}{3}x-\left(\frac{-2}{3}\right)^2.\left(-1\frac{1}{8}\right)=-119\frac{3}{4}+120\frac{5}{6}\)
Tìm x biết:
a) \(-4\frac{3}{5}.2\frac{4}{23}
Tìm x biết:
\(\left(2x+\frac{1}{3}\right)\left(\frac{3}{4}x-6\right)-\left(3x-\frac{2}{3}\right)\left(\frac{1}{2}x-\frac{6}{9}\right)=1\)
text{Tìm }x,text{ }text{biết:}1text{)}text{ }2.left(x-frac{1}{3}right)-3left(x-frac{1}{2}right)frac{1}{2}x2text{) }-3left(x-frac{1}{4}right)-frac{1}{3}left(x+frac{1}{2}right)xtext{3) }frac{3}{2}left(x-frac{5}{3}right)-frac{4}{5}x+1text{4) }frac{1}{6}left(2.x-3right)frac{1}{2}left(-x+frac{1}{4}-frac{2}{3}right)text{5) }-frac{2}{3}left(x-frac{1}{4}right)frac{1}{3}left(2.x-1right)
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\(\text{Tìm }x,\text{ }\text{biết:}\)
\(1\text{)}\text{ }2.\left(x-\frac{1}{3}\right)-3\left(x-\frac{1}{2}\right)=\frac{1}{2}x\)
\(2\text{) }-3\left(x-\frac{1}{4}\right)-\frac{1}{3}\left(x+\frac{1}{2}\right)=x\)
\(\text{3) }\frac{3}{2}\left(x-\frac{5}{3}\right)-\frac{4}{5}=x+1\)
\(\text{4) }\frac{1}{6}\left(2.x-3\right)=\frac{1}{2}\left(-x+\frac{1}{4}-\frac{2}{3}\right)\)
\(\text{5) }-\frac{2}{3}\left(x-\frac{1}{4}\right)=\frac{1}{3}\left(2.x-1\right)\)
tìm x, biết:
\(4\frac{1}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{2}{3}.\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)
Tìm x biết:
a/ \(x-\left(\frac{-3}{4}\right)=\frac{-2}{3}-\frac{1}{2}\)
b/ \(\left(3\frac{1}{2}-x\right).1\frac{1}{4}=\frac{15}{16}\)
c/ \(\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+...+\frac{2}{x.\left(x+1\right)}=\frac{2007}{2009}\left(x\in N,x\ge1\right)\)
tìm x biết :
a. \(\frac{1}{3}.x+\frac{2}{5}.\left(x-1\right)=0\)
b.\(3.\left(2.x-\frac{5}{4}\right)=\left(3-1\frac{1}{2}\right).\left(x-\frac{1}{2}\right)\)
Tìm x biết:
a)\(\frac{2}{3}.\left(x-\frac{3}{8}\right)-x-\left(-\frac{7}{8}+\frac{2}{3}\right)=\left(\frac{-3}{4}\right)^3:1\frac{11}{16}\)
b)\(-\frac{7}{8}+\frac{7}{8}:\left(\frac{2}{3}-x\right)+\frac{5}{6}:\left(-1\frac{11}{35}\right)=\left(0,8\right)^2\)