a)
3 -netto
3+23%*3=3+0,23*3=3+0,69=3,69 cena brutto
b)
123%=1,23
100%=1
1,23----------2,46
1----------.....x proporcja
x=2,46/1,23=2 zł cena netto
lub
1,23x=2,46
x=2,46/1,23
x=2
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a)
3 -netto
3+23%*3=3+0,23*3=3+0,69=3,69 cena brutto
b)
123%=1,23
100%=1
1,23----------2,46
1----------.....x proporcja
x=2,46/1,23=2 zł cena netto
lub
1,23x=2,46
x=2,46/1,23
x=2