Add \(15\) to both sides.
\[3x=x+1+15\]
Simplify \(x+1+15\) to \(x+16\).
\[3x=x+16\]
Subtract \(x\) from both sides.
\[3x-x=16\]
Simplify \(3x-x\) to \(2x\).
\[2x=16\]
Divide both sides by \(2\).
\[x=\frac{16}{2}\]
Simplify \(\frac{16}{2}\) to \(8\).
\[x=8\]
x=8
