Po obniszcze ceny o 20 % za spodnie zaplacono 124 zl ,jle kosztowaly przed obniszko ?
x-cena spodni
x-20%x=124
x-0,2x=124
0,8x=124
x= 155 zl
licze na naj
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x-cena spodni
x-20%x=124
x-0,2x=124
0,8x=124
x= 155 zl
licze na naj