Question

tìm x biết: x + 20%x = -4,8

Answer 1

x=-4 nha bạn

Answer 2

Ta có : x + 20%x = -4,8

   >> 100 %x + 20%x = -4,8

Answer 3

\(x+20\%x=-4,8\)

\(\Leftrightarrow x+\frac{1}{5}x=-4,8\)

\(\Leftrightarrow x\left(1+\frac{1}{5}\right)=-4,8\)

\(\Leftrightarrow x=\frac{-4,8}{1,2}\)

\(\Leftrightarrow x=-4\)