Question

x+30%×x=-1,3

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Answer 1

<=> x(1 + 30%) = -1/3

<=> x.13/10 = -1/3

<=> x = -10/39

Answer 2

Ta có:\(x+30\%\cdot x=-1,3\)

<=> \(x+0,3\cdot x=-1,3\)

<=> \(x\cdot\left(1+0,3\right)=-1,3\)

<=> \(x\cdot1,3=-1,3\)

<=> \(x=-1,3:1,3\)

<=> \(x=-1\)

Vậy: \(x=-1\)