\(7,5x:\left[9-6\frac{13}{21}\right]=2\frac{13}{25}\)
\(\Leftrightarrow7,5x:\left[9-\frac{139}{21}\right]=\frac{63}{25}\)
\(\Leftrightarrow7,5x:\frac{50}{21}=\frac{63}{25}\)
\(\Leftrightarrow7,5x=\frac{63}{25}.\frac{50}{21}\)
\(\Leftrightarrow7,5x=6\)
\(\Leftrightarrow x=6:7,5\)
\(\Leftrightarrow x=\frac{4}{5}=0,8\)
(Chúc bạn học tốt và tíck cho mìk vs nha!)
.tìm x:
\(7,5x:\left(9-6\frac{13}{21}\right)=2\frac{13}{25}\)
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 biết: a) 7,5x : \(\left(9-6\frac{13}{21}\right)\)= \(2\frac{14}{25}\)
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
Tim x \(\in\) Z biet :\(2.\left(x-2\right)^2=\frac{38}{25}+\frac{9}{10}-\frac{11}{15}+\frac{13}{21}-\frac{15}{28}+\frac{17}{36}-...+\frac{197}{4851}-\frac{199}{4950}\)
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\(\frac{13}{25}\)
Tìm x:
\(\frac{\left(13\frac{2}{9}-15\frac{2}{3}\right)\cdot\left(30^2-5^4\right)}{\left(18\frac{3}{7}-17\frac{1}{4}\right)\cdot\left(25-12\cdot5^2\right)}\cdot x=\frac{\frac{2}{11}+\frac{3}{13}+\frac{4}{15}+\frac{5}{17}}{4\frac{1}{11}+\frac{5}{13}+\frac{9}{15}+\frac{13}{17}}\)
Thực hiện phép tính
a) \(\left(4\frac{1}{9}+3\frac{1}{4}\right).2\frac{1}{4}+2\frac{3}{4}\)
b) \(1+\left(\frac{9}{10}-\frac{4}{5}\right):3\frac{1}{6}\)
c) (-7 + |13|) - (13 - |-7| - 25) - (25 + |-10| - 9 )