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x in (-oo:+oo)
x+x+(1/2)*x+(1/4)*x+1 = 100 // - 100
x+x+(1/2)*x+(1/4)*x-100+1 = 0
11/4*x-99 = 0 // + 99
11/4*x = 99 // : 11/4
x = 99/11/4
x = 36
x = 36
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