Question

x+ 30%. x= -1.3

 

Answer 1

\(x+30\%.x=-1,3\)

\(\Rightarrow x+\frac{30}{100}.x=-1,3\)

\(\Rightarrow x.\left(1+\frac{30}{100}\right)=-1,3\)

\(\Rightarrow x.\frac{13}{10}=-1,3\)

\(\Rightarrow x.1,3=-1,3\)

\(\Rightarrow x=-1\)

Vậy x = -1

Answer 2

x + 30% . x = -1,3

x ( 3/10 + 1 ) = -1,3

x . 13/10      = -1,3

x                   = -1,3 . 10/13

x                   = -1

hifi 

Answer 3

\(x+30\%x=-1,3\)

\(\Rightarrow x+\frac{30}{100}x=-1,3\)

\(\Rightarrow x+\frac{3}{10}x=-1,3\)

\(\Rightarrow\left(1+\frac{3}{10}\right)x=-1,3\)

\(\Rightarrow\frac{13}{10}x=-1,3\)

\(\Rightarrow x=-1,3:\frac{13}{10}\)

\(\Rightarrow x=-1\)

Vậy x = -1

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