Question

[TẠ NGUYỄN MINH PHƯƠNG]

Tìm y biết:

  y+30%y =−6,5

Answer 1

[Dương Lam Hàng]

\(y+30\%y=-6,5\)

\(\Leftrightarrow y+\frac{30}{100}y=\frac{-13}{2}\)

\(\Leftrightarrow y\left(1+\frac{30}{100}\right)=\frac{-13}{2}\)

\(\Leftrightarrow\frac{13}{10}y=\frac{-13}{2}\)

\(\Leftrightarrow y=\frac{-13}{2}:\frac{13}{10}\)

\(\Leftrightarrow y=-5\)

Vậy y = -5

Answer 2

[💥Hoàng Thị Diệu Thùy 💦]

y+30%y=-6,5

=>(1+30%)y=-6,5

=>(1+0,3)y=-6,5

=>1,3y=6,5

=>y=6,5:1,3

=>y=5

thanks