Question

Tìm x biết:

A=\(\frac{1}{3}\).x-\(\frac{2}{5}\).(x+1)=0

Ai làm nhanh mk tick cho

Answer 1

 1/3x-2/5(x+1)=0

 1/3x-2/5x-2/5=0

 -1/15x-2/5=0

-1/15x=6/15

x=-6

Answer 2

\(A=\frac{1}{3}.x-\frac{2}{5}.\left(x+1\right)=\)\(0\)

\(A=\frac{1}{3}.x-\frac{2}{5}x-\frac{2}{5}\)\(=0\)

\(A=x.\left(\frac{1}{3}-\frac{2}{5}\right)-\frac{2}{5}\)\(=0\)

\(A=x.\frac{-1}{15}=\frac{2}{5}\)

\(A=\frac{2}{5}\div\frac{-1}{15}\)

\(A=-6\)

Vậy \(A=-6\)

Answer 3

\(A=\frac{1}{3}x-\frac{2}{5}\left(x+1\right)=0\)

\(\frac{1}{3}x-\frac{2}{5}x-\frac{2}{5}=0\)

\(-\frac{1}{15}x=\frac{2}{5}\Leftrightarrow A=-6\)