In doua clasoare sunt 270 de timbre . Daca mutam 10% din timbrele din primul clasor in cel de-al doilea clasor , cele doua clasoare vor avea acelasi numar de timbre . Cate timbre se afla in fiecare clasor ?
renatemambouko
X=timbre in primul clasor 270-x=timbre in clasorul 2 x-10%x=270-x+10%x x-x/10=270-x+x/10 2x-2x/10=270 x-x/10=135 10x-x=1350 9x=1350 x=150 timbre in primul clasor 270-150=120 timbre in clasorul 2
270-x=timbre in clasorul 2
x-10%x=270-x+10%x
x-x/10=270-x+x/10
2x-2x/10=270
x-x/10=135
10x-x=1350
9x=1350
x=150 timbre in primul clasor
270-150=120 timbre in clasorul 2