7,5x:\(\frac{50}{21}\)=\(\frac{64}{25}\)
7,5x = \(\frac{64}{25}.\frac{50}{21}\)
7,5x = \(\frac{128}{21}\)
x = \(\frac{128}{21}:7,5\)
x = \(\frac{256}{315}\)
tìm x biết:
a,\(7,5x:\left(9-6\frac{13}{21}\right)=2\frac{13}{25}\)
b,\(\frac{\left(1,16-x\right)\cdot5,25}{\left(10\frac{5}{9}-7\frac{1}{4}\right)\cdot2\frac{2}{17}}\)=75%
.tìm x:
\(7,5x:\left(9-6\frac{13}{21}\right)=2\frac{13}{25}\)
7,5x:\(\left[9-6\frac{13}{21}\right]=2\frac{13}{25}\)
Tìm x, biết:
a) x : \(\left(3\frac{1}{2}-5\frac{1}{6}\right)\)= \(4\frac{1}{5}-6\frac{2}{3}\)
b) \(\left(2\frac{1}{3}+3\frac{1}{2}\right)\). x = \(-4\frac{1}{4}+3\frac{1}{7}\)
c) 7,5x : \(\left(9-6\frac{13}{21}\right)\) = \(2\frac{13}{25}\)
Tìm x, biết : 7,5x : (9- hỗn số 6 13/21) = hỗn số 2 12/25
Tìm x biết
a)2 \(\frac{x}{7}\) =\(\frac{75}{35}\) b)4\(\frac{3}{x}\)=\(\frac{47}{x}\)c)x\(\frac{x}{15}\)=\(\frac{112}{5}\) d)7,5x : ( 9 - 6\(\frac{13}{21}\)) =2\(\frac{13}{25}\)
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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Tìm x thuộc N, biết:
7,5x : (9- hỗn số 6 13/21)=7. (3/5)^2
tìm\(x\in z\)biết :
a.\(\frac{13}{15}-\left(\frac{13}{21}+x\right)\times\frac{7}{12}=\frac{7}{10}\)
b.\(\left(x+\frac{1}{4}-\frac{1}{3}\right)\div\left(2+\frac{1}{6}-\frac{1}{4}\right)=\frac{7}{46}\)
