Question

a+b+c =60.al doilea este de 2 ori mai mic decat primul,al treilea este suma celorlalte doua

Answer 1

a + b + c = 60
b = $\frac{a}{2}$ ==> a = 2b
c = a + b

c + c = 60 
2c = 60
c = 60 : 2
c = 30

a + b + a + b = 60
2a + 2b = 60
4b + 2b = 60
6b = 60
b = 10

a + 10 + 30 = 60
a + 40 = 60
a = 20

a = 20
b = 10
c = 30

Answer 2

a l___l___l b l___l c l___l___l___l b= 60:6=10 a=10x2=20 c =20+10=30