Answer
$ x = 0.129$
Work Step by Step
$-50x + 0.81 = -40x - 0.48$
Add $50x$ to both sides
$0.81 = 10x - 0.48$
Add 0.48 to both sides
$10x = 1.29$
Divide both sides by 10
$ x = 0.129$
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