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x in (-oo:+oo)
x+4 = (1/4)*x+25/4 // - (1/4)*x+25/4
x-((1/4)*x)-(25/4)+4 = 0
x+(-1/4)*x-25/4+4 = 0
3/4*x-9/4 = 0 // + 9/4
3/4*x = 9/4 // : 3/4
x = 9/4/3/4
x = 3
x = 3
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