$$0.16(5x+1)=0.4x+0.16$$
$x=0$
$$0.8x+0.16=0.4x+0.16$$
$$0.8x+0.16-0.4x=0.16$$
$$0.4x+0.16=0.16$$
$$0.4x=0.16-0.16$$
$$0.4x=0$$
$$x=0$$
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