\(x+30\%.x=-1,31\Leftrightarrow100x+30x=131\Leftrightarrow130x=131\Leftrightarrow x=\frac{131}{130}=1\frac{1}{130}\)
nhầm nhé làm lại \(x+30\%x=-1,31\Leftrightarrow100x+30x=-131\)
\(\Leftrightarrow130x=-131\Leftrightarrow x=-\frac{131}{130}\)
\(x+30\%.x=-1,31\)
\(x+\frac{3}{10}.x=\frac{-131}{100}\)
\(x.1+\frac{3}{10}.x=\frac{-131}{100}\)
\(x.\left(1+\frac{3}{10}\right)=\frac{-131}{100}\)
\(x.\frac{13}{10}=\frac{-131}{100}\)
\(x=\frac{-131}{100}:\frac{13}{10}\)
\(x=\frac{-131}{130}\)
\(x+30\%x=-1,31\)
\(=>100x+30x=131\)
\(=>130x=131\)
\(=>x=\frac{131}{130}=1\frac{1}{130}\)
co lam thi moi co an ok
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\(x+30\%x=-1,31\)
\(< =>x.\frac{100}{100}+x.\frac{30}{100}=-1,31\)
\(< =>x\left(\frac{100}{100}+\frac{30}{100}=-1,31\right)\)
\(< =>x.\frac{130}{100}=x.\frac{13}{10}=-1,31\)
\(< =>13x=-13,1\)
\(< =>130x=-131\)
\(< =>x=-\frac{131}{130}\)
hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhthhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh kk