\(x+30\%x=-1,3\)
\(x\left(1+30\%\right)=-1,3\)
\(x\left(1+0,3\right)=-1,3\)
\(x\cdot1,3=-1,3\)
\(x\cdot=\frac{-1,3}{1,3}=-1\)
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\(x+30\%x=-1,3\)
\(x+\frac{30}{100}x=-1,3\)
\(x.\left(\frac{30}{100}+1\right)=-1,3\)
\(x.1,3=-1,3\)
\(x=-1,3:1,3\)
\(x=-1\)
Chúc bn học tốt nhé! @good luck
