Question

aflati a,b,c daca :

a+b+c=132

a-c=b+c

c=b:4

 

Answer 1

a+b+c=132

a=b+c+c

a=b+2c

c=b/4

a=b+2*b/4

a=b+b/2=  (2b+b)/2=  3b/2

3b/2 +b+b/4 =132   aducem la acelasi numitor

6b +4b +b = 132*4

11b= 132*4

b=132*4/11

b=12*4

b=48

a=3*48/2= 3*24= 72
c=48/4=12