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x in (-oo:+oo)
2*x+16 = (5*x)/2+8 // - (5*x)/2+8
2*x-((5*x)/2)-8+16 = 0
2*x+(-5/2)*x-8+16 = 0
8-1/2*x = 0 // - 8
-1/2*x = -8 // : -1/2
x = -8/(-1/2)
x = 16
x = 16
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