irina,radu si marius au impreuna 750 de timbre. irina are cu 30 de timbre mai multe decat radu, iar marius de 4 ori mai multe decat radu. cate timbre are fiecare?
Radu are |___|; Marius are |___|___|___|___|;Irina are |___|+30. (750-30):6=720:6=120 timbre are Radu. Irina are 120+30=150 timbre. Marius are 120·4=480 timbre. Verificare 120+150+480=750.
