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x+5 = 15-((1/2)*x) // - 15-((1/2)*x)
x+(1/2)*x-15+5 = 0
3/2*x-10 = 0 // + 10
3/2*x = 10 // : 3/2
x = 10/3/2
x = 20/3
x = 20/3
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