2 szkoły ponadpodstawowej

II liceum

II technikum

Prosto do matury 1. Zakres podstawowy. Po gimnazjum

a) 35<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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5<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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Wiemy, że pan Raczek zainwestował na giełdzie 20 000 zł i podzielił w stosunku 1:4. Oznaczmy więc mniejszą część kapitału jako x, a większą  jako 4x. Możemy zapisać równanie: x+4x=20 000 5x=20 000   ∣:5 x=4000

Oznaczmy zgodnie z informacjami podanymi w zadaniu: x  −  poparcie dla Z˙oˊłtych (%) x+21​x=121​x  −  poparcie dla Niebieskich (%) x+25%⋅x=x+10025​x=x+41​x=141​x  −  poparcie dla Pomaranˊczowych (%) 25%  −  wyborcy niezdecydowani   Wszystkie te wielkości muszą dać razem całość, czyli 100%: x+121​x+141​x+25%=100%   ∣−25%

x  −  poparcie dla Wielbląda (%) x+6  −  poparcie dla Lwa (%) y  −  poparcie dla Lisa (%)

Obliczamy, o ile procent powierzchnia Niemiec jest mniejsza od powierzchni Francji, czyli obliczamy, jakim procentem powierzchni Francji jest różnica tych powierzchni:  551 tys. km2551 tys. km2−357 tys. km2​=551 tys. km2194 tys. km2​=551194​=0,35208…=35,208…%≈35,21%

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