\(5^3:x+100=125\)
\(\Rightarrow125:x+100=125\)
\(\Rightarrow125:x=125-100\)
\(\Rightarrow125:x=25\)
\(\Rightarrow125:25\)
\(\Rightarrow x=5\)
Vậy \(x=5\)
5³ : x + 100 = 125
5³ : x = 125 - 100
5³ : x = 25
5³ : x = 5²
x = 5³ : 5²
x = 5
53:x+100=12553:x+100=125
⇒125:x+100=125⇒125:x+100=125
⇒125:x=125−100⇒125:x=125−100
⇒125:x=25⇒125:x=25
⇒125:25⇒125:25
⇒x=5⇒x=5
Vậy x=5