Cancel \(9x\) on both sides.
\[-8x+4x=8x+3x\]
Simplify \(-8x+4x\) to \(-4x\).
\[-4x=8x+3x\]
Simplify \(8x+3x\) to \(11x\).
\[-4x=11x\]
Move all terms to one side.
\[4x+11x=0\]
Simplify \(4x+11x\) to \(15x\).
\[15x=0\]
Divide both sides by \(15\).
\[x=0\]
x=0
