Question

afla valoarea mr a,b,c daca : a-b=66, b-c=31,a+c=209​

Answer 1

Răspuns:

a=153

b=87

c=56

Explicație pas cu pas:

a-b=66

b-c=31⇒b=31-c

a+c=209 ⇒a=209-c

inlocuim in prima ecuatie

209-c-31-c=66

178-2c=66

112=2c ⇒c=112/2 ⇒c=56

⇒a=209-56=153

⇒b-c=31⇒b=31+c⇒b=31+56=87