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x in (-oo:+oo)
x/2+1 = x/5+1/4 // - x/5+1/4
x/2-(x/5)-(1/4)+1 = 0
x/2-(x/5)-1/4+1 = 0
3/10*x+3/4 = 0 // - 3/4
3/10*x = -3/4 // : 3/10
x = -3/4/3/10
x = -5/2
x = -5/2
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