5x.(x + 12) + 22 = 92
5x.x + 60 + 22 = 92
5x.x + 82 = 92
5x.x = 92 - 82
5x.x = 10
x.x = 10 : 5 = 2
=> x ko có giá trị
\(5.\left(x+12\right)+22=92\)
\(\Leftrightarrow5.\left(x+12\right)=92-22\)
\(\Leftrightarrow5.\left(x+12\right)=70\)
\(\Leftrightarrow x+12=14\)
\(\Leftrightarrow x=2\)
5 .(x + 12) + 22 = 92
5x + 60 + 22 = 92
5x + 82 = 92
5x = 92 - 82
5x = 10
x = 10 : 5 = 2
\(5\times\left(x+12\right)+22=92\)
\(5\times\left(x+12\right)\) \(=92-22\)
\(5\times\left(x+12\right)\) \(=70\)
\(x+12\) \(=70\div5\)
\(x+12\) \(=14\)
\(x\) \(=14-12\)
\(x\) \(=2\)
5 × ( x + 12 ) + 22 = 92
5 × ( x + 12 ) = 92 - 22
5 × ( x + 12 ) = 70
x + 12 = 70 : 5
x + 12 = 14
x = 14 - 12
x = 2
Vậy x = 2
