Question

jumatate din masa unei painii reprezinta o treime din masa unui cozonacdaca inpreuna 1250 g afla masa fiecaruia

Answer 1

Notam cu
x - masa unei paini
y - masa unui cozonac

x/2 = y/3
x = 2y/3
x + y = 1250
2y/3 + y = 1250 |×3
2y + 3y = 3750
5y = 3750 |:5
y = 750 g (masa unui cozonac)
x = 1250 - 750 = 500 g (masa unei paini)

Metoda grafica:
x+y = 1250
3x = 2y
x |___|___|
y |___|___|___|
5 segmente egale = 1250
1250 : 5 = 250 (un segment egal)
x = 2×250 = 500
y = 3×250 = 750

500 + 750 = 1250

Answer 2

P |-----|-----|
C |-----|-----|-----|
1250:5=250
P=250×2=500 g
C=250×3=750 g