a) \(5,2x+7\frac{2}{5}=6\frac{3}{4}\) b) \(2,4:\left(\frac{-1}{2}-x\right)=1\frac{3}{5}\)
\(5,2x+\frac{37}{5}=\frac{27}{4}\) \(2,4:\left(\frac{-1}{2}-x\right)=\frac{8}{5}\)
\(5,2x\) = \(\frac{27}{4}-\frac{37}{5}\) \(\frac{-1}{2}-x\)= \(2,4:\frac{8}{5}\)
\(5,2x\) = \(\frac{-13}{20}\) \(\frac{-1}{2}-x\)= \(\frac{3}{2}\)
x = \(\frac{-13}{20}:5,2\) x = \(\frac{-1}{2}-\frac{3}{2}\)
x = -0,125 x = \(\frac{-4}{2}\)= -2
Tìm x:
a) \(\frac{5}{6}-x=\frac{-7}{12}+\frac{2}{3}\)
b) \(\left(2,4.x-36\right):1\frac{5}{7}=-14\)
c) \(\left(3\frac{1}{2}+2.x\right).3\frac{2}{3}=5\frac{1}{3}\)
d) \(\frac{5}{6}-\left|\frac{1}{2}.x-\frac{1}{3}\right|=\frac{3}{8}\)
e) \(\left|\frac{1}{4}-2.x\right|-\frac{3}{4}=0\)
f) \(\left|x-\frac{1}{3}\right|+\frac{2}{3}=0\)
g) \(\left(\frac{3}{15}-x\right).\frac{1}{3}=\frac{2}{5}\)
Tìm x biết:a) \(-\frac{2}{3}\left(x-\frac{1}{4}\right)=\frac{1}{3}\left(2x-1\right)\)
b)\(\frac{1}{5}.2^x+\frac{1}{3}.2^x^{+1}=\frac{1}{5}.2^7+\frac{1}{3}2^8\)
Bài 1:Thực hiện phép tính
\(a,75\%-1\frac{1}{2}+0,5:\frac{5}{12}-\left(\frac{-1}{2}\right)^2\) \(b,\left(\frac{5}{7}.0,6-5:3\frac{1}{2}\right).\left(40\%-1,4\right).\left(-2\right)^3\)
Bài 2: Tính nhanh
\(\left(\frac{-4}{5}+\frac{4}{3}\right)+\left(\frac{-5}{4}+\frac{14}{5}\right)-\frac{7}{3}\)
Bài 3:Tìm x biết
\(a,\frac{-2}{3}-\frac{1}{3}.\left(2x-5\right)=\frac{3}{2}\) \(b,\frac{2}{5}.x+\frac{1}{2}=\frac{-3}{4}\) \(\frac{1}{3}.x-8=\frac{1}{2}\) \(x-\frac{1}{4}=\frac{5}{8}.\frac{2}{3}\)
Bài 4: Tìm x biết
\(a,\left(\frac{3}{4}.x+2\frac{1}{2}\right).\frac{-2}{3}=\frac{1}{8}\) \(b,\frac{1}{3}.x-0,5=0,75\)
Bài 5: Tìm x biết
\(a,\frac{2}{5}+\frac{3}{5}.\left(3x-3,7\right)=-\frac{53}{10}\) \(b,5,2.x+7\frac{2}{5}=6\frac{3}{4}\) \(2,4:\left(\frac{-1}{2}-x\right)=1\frac{3}{5}\)
Bài 6:Tìm số tự nhiên x,biết: \(\left(x-5\right).\frac{30}{100}=\frac{20.x}{100}+5\)
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Tìm x
a)\(\frac{1}{5}-\frac{2}{3}+2x=\frac{1}{2}\)
b)\(4\left(\frac{1}{3}-3\right)+\frac{1}{2}=\frac{5}{6}+x\)
c)\(3\left(\frac{1}{2}-x\right)-5\left(x-\frac{1}{10}\right)=-\frac{7}{4}\)
d)\(4\left(\frac{3}{4}+x\right)-\frac{1}{5}=7x-\frac{1}{7}\)
1, \(\frac{2}{9}.\left(x-\frac{9}{4}\right)+\frac{1}{2}=\frac{3}{7}.\left(7-\frac{1}{6}\right)+\frac{1}{3}\)
2, \(2.\left(\frac{3}{2}-x\right)-\frac{1}{3}=7x-\frac{1}{4}\)
3,\(-\frac{3}{2}.\left(5-\frac{1}{6}\right)+4.\left(x-\frac{1}{2}\right)=\frac{1}{2}+x\)
4,\(-\frac{5}{7}.\left(\frac{2}{5}-x\right)-\frac{1}{3}=\frac{1}{5}-\frac{3}{10}\)
5,\(4-\frac{2}{3}.\left(x-3\right)=2-\frac{1}{2}+\frac{2}{3}\)
6,\(\frac{2}{3}-\frac{5}{3}.x=\frac{7}{10}.x+\frac{5}{6}\)
7,\(3.\left(x-\frac{5}{3}\right)+\frac{1}{2}=2\left(x-\frac{1}{4}\right)+\frac{5}{2}\)
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Tìm x
\(\frac{5}{2}-\left(\frac{3}{2}-2\frac{1}{3}+x\right)=\frac{8}{15}-\left(\frac{1}{4}-\frac{7}{10}\right)\)
\(1\frac{2}{3}-1\frac{3}{5}+x=\frac{2}{5}-\left|\frac{3}{4}-\frac{7}{8}\right|\)
\(2-\left(\frac{2}{3}-3\frac{1}{4}+x\right)=1\left|\frac{1}{6}-\frac{13}{12}\right|\)
2.Tìm x
a) \(\frac{a}{b}x-\frac{7}{8}=\frac{1}{4}\)
b)\(\frac{3}{2}x-\frac{1}{2}=\frac{1}{3}:\left(\frac{-5}{6}\right)\)
c)\(\frac{2}{3}\left(x+\frac{5}{4}\right)-\frac{1}{3}\left(\frac{2}{3}-x\right)=\frac{4}{3}\)
Tìm x, biết :
a) 5,2 . x + \(7\frac{2}{5}\) = \(6\frac{3}{4}\)
b) 2,4 : \(\left(\frac{-1}{2}-x\right)\)= \(1\frac{3}{5}\)
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)\(-\frac{7}{8}+\frac{7}{8}:\left(\frac{2}{3}-x\right)+\frac{5}{6}:\left(-1\frac{11}{35}\right)=\left(0,8\right)^2\)
