Question

Cosmin pleaca in tabara.Mama ii da o suma de bani pe care Cosmin si-a planificat-o astfel:o treime din suma pt excursii,2/8 din rest pt intrari la ob turistice,2/6 din noul rest pt suveniruri,o cincime pt dulciuri,iar restul de 240 pt cheltuieli neprevazute.Cati lei a avut Cosmin in tabara?Cati lei a planificat pt fiecare activitate?

Answer 1

x-suna primita

excursie x-x/3=(3×-×)/3=2×/3

ob. turistice 2×/3-2×/3•2/8=2×/3-×/6=(2•2x-x)/6=3x/6=x/2

suveniruri x/2×/2•2/6=x/2-x/6=(3x-x)/6=2x/6=x/3

dulciuri x/3-x/3•1/5=x/3-x/15=(5x-x)/15=4x/15

4x/15=240

×=(240•15)/4=900 lei a primit de la mama

excursii 900/3=300lei

ob. turistice (900-300)•2/8=150

suveniruri (900-300-150)•2/6=150

dulciuri (900-300-150-150)•1\5=60

chelt. neprevăzute = 240

300+150+150+60+240=900