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\(\left(\frac{13}{84}.\frac{7}{5}-\frac{5}{2}.\frac{7}{180}\right):\frac{43}{18}+\frac{9}{2}.\frac{1}{10}\)
\(=\frac{43}{360}:\frac{43}{18}+\frac{9}{20}=\frac{1}{20}+\frac{9}{20}=\frac{10}{20}=\frac{1}{2}\)
|x+3|=|-9|
TH1: x+3=9 => x=9-3 TH2: x+3=-9=> x=-9 -3
x=6 x=-12
A = \(\frac{7}{18}\) : \(\frac{5}{13}\) - \(\frac{2}{18}\)x \(\frac{13}{5}\)
A = \(\frac{91}{90}\) - \(\frac{13}{45}\)
A = \(\frac{13}{18}\)
A=\(\frac{7}{18}\):\(\frac{5}{13}-\frac{2}{18}x\frac{13}{5}\)
A=\(\frac{7}{18}x\frac{13}{5}-\frac{2}{18}x\frac{13}{5}\)
A=\(\frac{13}{5}x\left(\frac{7}{18}-\frac{2}{18}\right)\)
A=\(\frac{13}{5}x\frac{5}{18}\)
A=\(\frac{13}{18}\)
k mink nhé
\(\left(\dfrac{13}{18}\times1,4-2,5\times\dfrac{7}{180}\right):\dfrac{7}{18}\)
\(=\left(\dfrac{13}{18}\times\dfrac{14}{10}-\dfrac{25}{10}\times\dfrac{7}{180}\right)\times\dfrac{18}{7}\)
\(=\left(\dfrac{13}{18}\times\dfrac{7}{5}-\dfrac{5}{2}\times\dfrac{7}{180}\right)\times\dfrac{18}{7}\)
\(=\left(\dfrac{91}{90}-\dfrac{7}{72}\right)\times\dfrac{18}{7}\)
\(=\dfrac{329}{360}\times\dfrac{18}{7}=\dfrac{47}{20}\)