Question

Trei ursuleti si doua papusi costa 220 lei, iar 5 ursuleti si doua papusi costa 300 lei.Cat costa un ursulet? Dar o papusa?( prin metoda comparatiei)

Answer 1

5 ursuleti+2 papusi =300 lei
3 ursuleti+2 papusi=220 lei
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2 ursuleti -------------=80 lei
1 ursulet=80:2
1 ursulet=40

40x3+2 papusi=220 lei
120+2 papusi=220 lei
2 papusi=220-120
2 papusi=100
1 papusa=100:2
1 papusa=50 lei