$$(2-x)+2(3-2x)=-29$$
$x = \frac{37}{5} = 7\frac{2}{5} = 7.4$
$$2-x+6-4x=-29$$
$$8-x-4x=-29$$
$$8-5x=-29$$
$$-5x=-29-8$$
$$-5x=-37$$
$$x=\frac{-37}{-5}$$
$$x=\frac{37}{5}$$
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