Rozwiązaniem równania z parametrem p: x+p(x-1)=4 jest liczba 2 dla p=...?
x+p(x-1)=4
x+px-p=4
x(1+p)=4+p
x=[4+p]/[1+p]
x=2
2+2p=4+p
p=2
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x+p(x-1)=4
x+px-p=4
x(1+p)=4+p
x=[4+p]/[1+p]
x=2
2+2p=4+p
p=2