[tex]\begin{gathered} -4x+9=2x+10,\text{ by addition property of equality, we can add }-2x\text{ on both sides} \\ -4x-2x+9=2x-2x+10,\text{ the }2x\text{ in the right hand side is cancelled out and} \\ -6x+9=10,\text{ we simplify the left side} \end{gathered}[/tex]
