Какие значения переменной \(\displaystyle x\) допустимыми для дроби \(\displaystyle \frac{x+7}{x+7}{\small?}\)

• \(\displaystyle -7\)
• \(\displaystyle 2\)
• \(\displaystyle -9\)
• \(\displaystyle 4{,}3\)
• \(\displaystyle 0\)