Methods:
\(3x-2=13\)
=> \(3x-2+2=13+2\)
=> \(3x+0=15\)
=> \(3x=15\)
=> \(\frac{3}{3}x= \frac{15}{3}\)
=> \(x = \frac{5}{1}\) or \(5\)
or, (do side changing)
\(3x-2=13\)
=> \(3x=13+2\)
=> \(3x=15\)
=> \(x= \frac{15}{3}\)
=> \(x= \frac{5}{1}\) or \(5\)
