\(\left(-\frac{x}{5}+\frac{2}{3}\right):\frac{11}{5}=\frac{5}{21}+\frac{3}{7}\)
\(-\frac{x}{5}+\frac{2}{3}=\frac{68}{77}\times\frac{11}{5}\)
\(-\frac{x}{5}=\frac{68}{35}-\frac{2}{3}\)
\(-\frac{x}{5}=\frac{134}{105}\)
=>105(-x)=134*5
=>-105x=670
=>x=\(-\frac{134}{21}\)
\(\left(\frac{x}{-5}+1\frac{1}{2}\right):\frac{28}{75}-1,4\cdot\frac{15}{49}=\left|-\frac{2}{3}\right|.\left(-\frac{3}{2}\right)^3\)
Tìm x
Tìm x biết :
\(\left[\frac{6:\frac{3}{5}-1\frac{1}{16}.\frac{6}{7}}{4\frac{1}{5}.\frac{10}{11}+5\frac{2}{11}}-\frac{\left(\frac{3}{20}+\frac{1}{2}-\frac{1}{15}\right).\frac{12}{49}}{3\frac{1}{3}+\frac{2}{9}}\right].x=2\frac{23}{96}\)
1. Tính
\(1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)
2 . Tìm x
3- (1/6 -x ) .2/3 =2/3
\(Tìm\)\(x\)\(\in\)\(ℤ\)biết :a) -1\(1\frac{4}{12}-1\frac{3}{12}\le x\le\frac{4}{3}.\frac{13}{4}\)
b)\(\left(\frac{x}{-5}+\frac{2}{3}\right):2\frac{1}{5}-1,4.\frac{15}{49}=|\frac{-5}{21}|\)
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Tìm x:
\(\frac{\left(13\frac{2}{9}-15\frac{2}{3}\right)\cdot\left(30^2-5^4\right)}{\left(18\frac{3}{7}-17\frac{1}{4}\right)\cdot\left(25-12\cdot5^2\right)}\cdot x=\frac{\frac{2}{11}+\frac{3}{13}+\frac{4}{15}+\frac{5}{17}}{4\frac{1}{11}+\frac{5}{13}+\frac{9}{15}+\frac{13}{17}}\)
A= \(-1,6\div\left(1+\frac{2}{3}\right)\)
B=\(1,4\times\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right)\div2\frac{1}{5}\)
1. Tìm x thuộc Z biết:
a,\(\frac{-5}{6}.\frac{120}{25}< x< \frac{-7}{15}.\frac{9}{14}\)
b,\(\left(\frac{-5}{3}\right)^3< x< \frac{-24}{35}.\frac{-5}{6}\)
2. Thực hiện phép tính:
a,\(\left(\frac{9}{10}-\frac{15}{16}\right).\left(\frac{5}{12}-\frac{11}{15}-\frac{7}{20}\right)\)
b,\(\frac{-3}{5}+\frac{28}{5}.\left(\frac{43}{56}+\frac{5}{24}-\frac{21}{63}\right)\)
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Bài 1: Thực hiện phép tính bằng cách hợp lí ( nếu có thể )
a, \(\frac{-4}{5}-\frac{8}{25}\left(\frac{-5}{2}-0,125\right)\) b, \(5\frac{1}{2}-4\frac{2}{3}:\frac{16}{9}-3\frac{1}{3}:\frac{16}{9}\)
c, \(\left(-1,5\right).\left(1+\frac{2}{3}\right)+1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)
Bài 2: Tìm x, biết
a, ( 20%x + \(\frac{2}{5}\)x - 2 ) : \(\frac{1}{3}\)= -2013 b, ( 4,5 - 2 |x| ) . 1\(\frac{4}{7}\)= \(\frac{11}{14}\)
a) \(1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\) =?