Question

Cinci stilouri si trei pixuri costa 72,70 lei.Noua pixuri si opt stilouri costa 130,60 lei.Cat costa un pix?Cat costa un stilou?

Answer 1

5stilouri....3pixuri....72,70lei 8stilouri....9pixuri....130,60lei 5stilouri....3pixuri....72,70lei /×3 15stilouri....9pixuri....218,10lei (-) 8stilouri....9pixuri....130,60lei => 7stilouri =87,5lei 1stilou=12,5lei Inlocuim in prima relatie: 5×12,5+3pixuri=72,70 62,5+3pixuri=72,70 3pixuri=10,2lei =>1pix= 3,4lei