\(\Leftrightarrow\frac{x+100+9}{3}+\frac{x+100+25}{5}+\frac{x+100+49}{7}+\frac{100+81}{9}=2\)
<=> \(\frac{x+100}{3}+3+\frac{x+100}{5}+5+\frac{x+100}{7}+7+\frac{x+100}{9}+9=24\)
<=> \(\left(x+100\right)\left(\frac{1}{3}+\frac{1}{5}+\frac{1}{7}+\frac{1}{9}\right)+24=24\)
<=> \(\left(x+100\right)\left(\frac{1}{3}+\frac{1}{5}+\frac{1}{7}+\frac{1}{9}\right)=0\Leftrightarrow x+100=0\Leftrightarrow x=-100\)
Chào Trang! Em kiểm tra lại đề nhé!
\(\frac{x+109}{3}+\frac{x+125}{5}+\frac{x+149}{7}+\frac{x+181}{9}=24?\)