Ta có: \(70:\left(x-3\right)=\left(3^4-1\right):4-10\)
\(\Leftrightarrow70:\left(x-3\right)=80:4-10=10\)
\(\Leftrightarrow x-3=7\)
hay x=10
70 : ( x - 3 ) = ( 3^4 - 1 ) : 4 - 10
Ta có : \(\left(3^4-1\right):4-10\)
= \(\left(81-1\right):4-10\)
= \(80:4-10\)
= \(20-10\)
= \(10\)
⇒\(70:\left(x-3\right)\)\(=10\)
⇒ \(x-3\) \(=\) \(70:10\)
⇒ \(x-3=7\)
⇒ \(x\) \(=7+3\)
⇒ \(x\) \(=10\)
Vậy \(x=10\)