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\(\frac{2}{5}+\frac{3}{5}.\left(3x-3,7\right)=\frac{-53}{10}\)
\(\frac{3}{5}.\left(3x-3,7\right)=\frac{-57}{10}\)
\(\left(3x-3,7\right)=\frac{-19}{2}\)
\(3x=-5,8\)
\(x=\frac{-29}{15}\)
Vậy \(x=\frac{-29}{15}\)
Dễ quá mà bn ko biết làm à
2/3x -3/2x=5/12
x(2/3-3/2)=5/12
x=5/12. (-5/6)
x=-25/72
a)
\(\begin{array}{l}x + \left( { - \frac{1}{5}} \right) = \frac{{ - 4}}{{15}}\\x = \frac{{ - 4}}{{15}} + \frac{1}{5}\\x = \frac{{ - 4}}{{15}} + \frac{3}{{15}}\\x = \frac{{ - 1}}{{15}}\end{array}\)
Vậy \(x = \frac{{ - 1}}{{15}}\).
b)
\(\begin{array}{l}3,7 - x = \frac{7}{{10}}\\x = 3,7 - \frac{7}{{10}}\\x = \frac{{37}}{{10}} - \frac{7}{{10}}\\x=\frac{30}{10}\\x = 3\end{array}\)
Vậy \(x = 3\).
c)
\(\begin{array}{l}x.\frac{3}{2} = 2,4\\x.\frac{3}{2} = \frac{{12}}{5}\\x = \frac{{12}}{5}:\frac{3}{2}\\x = \frac{{12}}{5}.\frac{2}{3}\\x = \frac{8}{5}\end{array}\)
Vậy \(x = \frac{8}{5}\)
d)
\(\begin{array}{l}3,2:x = - \frac{6}{{11}}\\\frac{{16}}{5}:x = - \frac{6}{{11}}\\x = \frac{{16}}{5}:\left( { - \frac{6}{{11}}} \right)\\x = \frac{{16}}{5}.\frac{{ - 11}}{6}\\x = \frac{{ - 88}}{{15}}\end{array}\)
Vậy \(x = \frac{{ - 88}}{{15}}\).
\(x+x+\frac{1}{5}+x+\frac{2}{5}+x+\frac{3}{5}+x+\frac{4}{5}=5x+\frac{10}{5}\)
\(5x+2>5x\)
\(A>B\)
\(x+x+\frac{1}{5}+x+\frac{2}{5}+x+\frac{3}{5}+x+\frac{5}{5}=5x+\frac{10}{5}\)
\(5x+2>5x\)
\(A>B\)
(−23×x−35)×(3−2−103)=25(−23×x−35)×(3−2−103)=25
⇔(−23×x−35)×−296=25⇔(−23×x−35)×−296=25
⇔−23×x−35=25÷−296⇔−23×x−35=25÷−296
⇔−23×x−35=−12145⇔−23×x−35=−12145
⇔−23×x=−12145+35⇔−23×x=−12145+35
⇔−23×x=1529⇔−23×x=1529
⇔x=1529÷−23⇔x=1529÷−23
⇔x=−4558⇔x=−4558
\(a,\frac{-3}{2}-2x+\frac{3}{4}=-1\)
\(\frac{-3}{2}-2x=-1-\frac{3}{4}\)
\(\frac{-3}{2}-2x=\frac{-7}{4}\)
\(2x=\frac{-7}{4}+\frac{-3}{2}\)
\(2x=\frac{-13}{4}\)
\(x=\frac{-13}{4}:2\)
\(x=\frac{-13}{4}.\frac{1}{2}\)
\(x=\frac{-13}{8}\)
Dễ
\(\frac{2}{5}+\frac{3}{5}\times\left(3x-3,7\right)=-\frac{53}{10}\)
\(\frac{3}{5}\times\left(3x-3,7\right)=-\frac{53}{10}-\frac{2}{5}\)
\(\frac{3}{5}\times\left(3x-3,7\right)=-\frac{57}{10}\)
\(\left(3x-3,7\right)=-\frac{57}{10}\div\frac{3}{5}\)
\(3x-3,7=-\frac{19}{2}\)
\(3x=-\frac{19}{2}+3,7\)
\(3x=-\frac{29}{5}\)
\(x=-\frac{29}{5}\div3\)
\(x=-\frac{29}{15}\)
Chúc bạn học tốt ^^