Question

Afla suma numerelor a+b+c, daca a=b:5, b-c=420 si b=975

Answer 1

b=5a;
⇒b=975
⇒975=5a
⇒a=975/5
⇒a=195;
⇒b=c+420
⇒975=c+420
⇒c=975-420
⇒c=555;
⇒a+b+c
⇒195+975+555
⇒1725;

Answer 2

a + b + c = ? 
a = b : 5 
b-c = 420 
b= 975

a=   975 : 5 
a = 195 
c = 975 - 420
c= 555

a + b + c = ?
195 + 975 + 555 = 1725