Question

Suma a trei numere este 300. Daca la fiecare se adauga acelasi numar , se obtin numerele : 155 , 105 si 110.
   Care sunt numerele?

Answer 1

155+105+110=370
370-300=70
70:3=23,(3)
155-23,(3)=131,(6)=1185/9
105-23,(3)=81,(6)=735/9
110-23,(3)=86,(6)=780/9

1185/9+735/9+780/9=2700/9=300

Answer 2

a+b+c=300
a+x=155
b+x=105
c+x=110
a=155-x
b=105-x
c=110-x
155-x+105-x+110-x=300
370-3x=300
370-300=3x
3x=70
x=70/3
a=155-70/3=(465-70)/3=395/3
b=105-70/3=(315-70)/3=245/3
c=110-70/3=(330-70)/3=260/3