Answer
$x=2$
Work Step by Step
$5x-18=-4x$ $\longrightarrow$addition property
$5x-18-5x=-4x-5x$ $\longrightarrow$combine like terms
$-18=-9x$ $\longrightarrow$multiplication property
$-18\div-9=-9x\div-9$ $\longrightarrow$simplify
$2=x$
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