Question

Ajutoor!Dau coroana și multe puncte.​

Answer 1

a)a+b+c=67

a+b=39

39+c=67

c=67-39=28

c=2×b

b=c/2=28/2=14

a=39-b=39-14=25

(a,b,c)=(25,14,28)

b)a+b+c=78

a+c=63

b+63=78

b=78-63=15

a=3-b

a=3-15=-12

c=63-a=63+12=75

(a,b,c)=(-12,15,75)