Question

Tìm X :   Cho   x+109/3 +x+125/5  + x+149/7 + x+181/9  = 2      tìm x

Answer 1

\(\Leftrightarrow\frac{x+100+9}{3}+\frac{x+100+25}{5}+\frac{x+100+49}{7}+\frac{100+81}{9}=2\)

<=> \(\frac{x+100}{3}+3+\frac{x+100}{5}+5+\frac{x+100}{7}+7+\frac{x+100}{9}+9=24\)

<=> \(\left(x+100\right)\left(\frac{1}{3}+\frac{1}{5}+\frac{1}{7}+\frac{1}{9}\right)+24=24\)

<=> \(\left(x+100\right)\left(\frac{1}{3}+\frac{1}{5}+\frac{1}{7}+\frac{1}{9}\right)=0\Leftrightarrow x+100=0\Leftrightarrow x=-100\)

Answer 2

Chào Trang! Em kiểm tra lại đề nhé!

\(\frac{x+109}{3}+\frac{x+125}{5}+\frac{x+149}{7}+\frac{x+181}{9}=24?\)