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5-((1/4)*x) = 15-((1/4)*x) // - 15-((1/4)*x)
(1/4)*x-((1/4)*x)-15+5 = 0
(-1/4)*x+(1/4)*x-15+5 = 0
-10 = 0
x belongs to the empty set
x belongs to the empty set
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