\(\frac{8}{23}\cdot\frac{46}{24}-x=\frac{1}{3}\)
=> \(\frac{2}{3}-x=\frac{1}{3}\)
=> \(x=\frac{1}{3}\)
\(\frac{10}{12}\div x=\frac{28}{9}\cdot\frac{3}{56}\)
=> \(\frac{10}{12}\div x=\frac{1}{6}\)
=> \(x=\frac{60}{12}=5\)
\(\frac{x-12}{4}=\frac{1}{2}\)
=> \(\left(x-12\right)\cdot2=4\cdot1\)
=> \(2x-24=4\)
=> \(2x=28\)
=> \(x=14\)
tính A=\(\frac{1}{2}+\frac{2}{3}+\frac{3}{4}+\frac{4}{5}+......+\frac{2015}{2016}\)
tim x \(\frac{x-2}{12}+\frac{x-2}{20}+\frac{x-2}{30}+\frac{x-2}{42}+\frac{x-2}{56}+\frac{x-2}{72}+\frac{16}{9}\)
bài 2 tìm x
a,\(\frac{-2}{3}.x+\frac{1}{5}=\frac{3}{10}\)
b,\(\left|x\right|-\frac{3}{4}=\frac{5}{3}\)
c,\(\frac{2}{3}.x-\frac{1}{2}=\frac{1}{10}\)
d,\(\frac{3}{5}+\frac{4}{9}:x=\frac{2}{3}\)
e,\(\left|x+75\%\right|=2\frac{1}{5}\)
i,\(\left(x+\frac{1}{2}\right).\left(\frac{2}{3}-2.x\right)=0\)
k,\(\frac{4}{7}.x-\frac{2}{3}=\frac{1}{5}\)
l,\(\frac{2}{3}.x-\frac{3}{2}.x=\frac{5}{12}\)
m,\(\left|2.x-\frac{1}{3}\right|+\frac{5}{6}=1\)
n,\(\frac{1}{3}-\frac{7}{8}.x=\frac{1}{3}\)
11,\(\frac{x+2}{5}=\frac{7}{12}-1\frac{1}{4}\)
12,\(\left(2\frac{4}{5}.x-50\right):\frac{2}{3}=51\)
13,\(\frac{2}{5}+\frac{3}{5}.\left(3.x-3,7\right)=-\frac{53}{10}\)
14,\(\frac{7}{9}:\left(2+\frac{3}{4}.x\right)+\frac{5}{9}=\frac{23}{27}\)
Bài 1:Tìm x Biết
a\ \(x-\frac{10}{3}=\frac{7}{15}\times\frac{3}{5}\)
b\ \(x+\frac{3}{22}=\frac{27}{121}\times\frac{11}{9}\)
c\ \(\frac{8}{23}\times\frac{46}{24}-x=\frac{1}{3}\)
d\ \(1-x=\frac{49}{65}\times\frac{5}{7}\)
a) \(\left|2x\frac{1}{3}\right|+\frac{5}{6}=1\)
b)\(\frac{17}{2}-\left|2x-\frac{3}{4}\right|=-\frac{7}{4}\)
c) \(\frac{2}{3}x-\frac{3}{2}x=\frac{5}{12}\)
d) \(\frac{2}{5}+\frac{3}{5}.\left(3x-3,7\right)=-\frac{53}{10}\)
e) \(\frac{7}{9}:\left(2+\frac{3}{4}x\right)+\frac{5}{9}=\frac{23}{27}\)
f) \(\left(2\frac{4}{5}x-50\right):\frac{2}{3}=51\)
g)\(\left(x+\frac{1}{2}\right).\left(\frac{2}{3}-2x\right)=0\)
h)\(x.3\frac{1}{4}+\left(-\frac{7}{6}\right).x-1\frac{2}{3}=\frac{5}{12}\)
i)\(\frac{6}{2}=\frac{-5+x}{15}\)
k)\(\frac{1}{21}+\frac{1}{28}+\frac{1}{36}+...+\frac{2}{x\left(x+1\right)}=\frac{2}{9}\)
Tính các tổng sau:
\(C=\frac{5}{7}.\frac{5}{11}+\frac{5}{7}.\frac{2}{11}-\frac{5}{7}.\frac{14}{11}\)
Tìm x
\(x-\frac{3}{10}=\frac{5}{7}\)
\(x+\frac{3}{22}=\frac{27}{121}.\frac{11}{9}\)
\(\frac{8}{23}.\frac{46}{24}-x=\frac{1}{3}\)
\(1-x=\frac{49}{65}.\frac{5}{7}\)
\(x+\frac{4}{5.9}+\frac{4}{9.13}+\frac{4}{13.17}+...+\frac{4}{41.45}=\frac{-37}{45}\)
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
\(\frac{-9}{46}-4\frac{1}{23}:\left(3\frac{1}{4}-x:\frac{3}{5}\right)+2\frac{8}{23}=1\)
Tìm X:
a) 2 - ( 5\(\frac{3}{8}\)x X - \(\frac{5}{24}\)= \(\frac{5}{12}\)
b) 1\(\frac{2}{9}\): ( 3\(\frac{1}{3}\)x X + \(\frac{1}{6}\)) = \(\frac{22}{23}\)
c) \(\frac{4}{5}\)x X - \(\frac{1}{2}\)x X + \(\frac{3}{4}\)x X = \(\frac{7}{40}\)
Giúp nha.......
1/Thực hiện phép tính
a) \(\left(\frac{2}{5}+\frac{-5}{8}\right):\frac{11}{30}+\frac{1}{8}\)
b) \(\frac{4}{9}+\frac{7}{12}:\frac{3}{8}-\left(\frac{-5}{6}\right)\)
c)\(\left(\frac{2}{5}+\frac{-5}{8}\right):\frac{24}{5}+\left(\frac{13}{8}+\frac{18}{5}\right):\frac{24}{5}\)
d)\(\frac{4}{2\cdot5}+\frac{4}{5\cdot8}+\frac{4}{8\cdot11}...+\frac{4}{20\cdot23}+\frac{4}{23\cdot26}\)
Câu 2: Tìm x
a) \(4\frac{1}{2}+x=5-0,3\)
b)\(\frac{7}{9}-\frac{2}{5}x=\frac{3}{4}x-\frac{1}{6}\)
c)\(\frac{7}{12}-\left(x+70\%\right):1,2=\frac{-5}{4}\)
d)\(|\frac{5}{8}x+\frac{6}{7}|-\frac{4}{7}=\frac{10}{7}\)
Mik cần gấp nhé! Ai nhanh mik tick
