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x in (-oo:+oo)
10-(5*x) = ((20-(10*x))^1)/2 // - ((20-(10*x))^1)/2
10-(((20-(10*x))^1)/2)-(5*x) = 0
10-((20-10*x)/2)-5*x = 0
(-1*(20-10*x))/2-5*x+10 = 0
(-1*(20-10*x))/2+(-5*2*x)/2+(2*10)/2 = 0
2*10-1*(20-10*x)-5*2*x = 0
20-20 = 0
0 = 0
0/2 = 0
0/2 = 0 // * 2
0 = 0
0 = 0
x należy do R
x in (-oo:+oo)
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