$$10x+19=4x+34$$
$x = \frac{5}{2} = 2\frac{1}{2} = 2.5$
$$10x+19-4x=34$$
$$6x+19=34$$
$$6x=34-19$$
$$6x=15$$
$$x=\frac{15}{6}$$
$$x=\frac{5}{2}$$
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