=> -3,25;(-1/3x)=28/3
=> -1/3x=28/3*(-3,25)
=> -1/3x=-91/3
=>x=-91/3:(-1/3)
=> x=91
vậy x=91
study well
k nha
mk xin cảm ơn mọi ng nhiều
(-3,25) : (\(-\frac{1}{3}x\)) = (\(-2\frac{1}{3}\)) : (-0,25)
<=> \(-\frac{1}{3}x\)= \(-\frac{39}{112}\)
<=>x = \(\frac{117}{112}\)
\(\left(3,25\right).\left(-3x\right)=\left(-\frac{5}{3}\right).\left(-4\right)\)
\(\left(-3,25\right).\left(-3x\right)=\frac{20}{3}\)
\(\left(-3x\right)=\frac{20}{3}:\left(-3,25\right)\)
\(\left(-3x\right)=-\frac{80}{39}\)
\(x=-\frac{80}{39}:3\)
\(x=-\frac{80}{117}\)
\(-3,25:\left(-\frac{1}{3}x\right)=\left(-2\frac{1}{3}\right):\left(-0,25\right)\)
\(-\frac{13}{4}:\left(-\frac{1}{3}x\right)=\left(-\frac{7}{3}\right):-\frac{1}{4}\)
\(-\frac{13}{4}:\left(-\frac{1}{3}x\right)=\left(-\frac{7}{3}.-4\right)\)
\(-\frac{13}{4}:\left(-\frac{1}{3}x\right)=-\frac{28}{3}\)
\(\left(-\frac{1}{3}x\right)=-\frac{13}{4}:-\frac{28}{3}\)
\(\left(-\frac{1}{3}x\right)=\left(-\frac{13}{4}\right).\left(-\frac{3}{28}\right)\)
\(-\frac{1}{3}x=\frac{39}{112}\)
\(x=\frac{39}{112}:-\frac{1}{3}\)
\(x=\frac{39}{112}.-3\)
\(x=-\frac{117}{112}\)
Vậy \(x=-\frac{117}{112}\)
Chúc bạn học tốt !!!