Question

Aflați a.b.c.daca a+b=700
b+c=500
a+c=800

Answer 1

Răspuns:

Scadem relatiile:

(a+c)-(b+c)=800-500

a+c-b+c=300

a-b=300

a=300+b

300+b+b=700

2b=400

b=200

a=300+200

a=500

500+c=800

c=300