Answer
$x=3$
Work Step by Step
$2x+9=5x$ $\longrightarrow$addition property of equality
$2x+9-2x=5x-2x$ $\longrightarrow$combine like terms
$9=3x$ $\longrightarrow$multiplication property of equality
$9\div3=3x\div3$ $\longrightarrow$simplify
$3=x$