Question

ajutor va rog !!!! dau coroana!!!!

Answer 1

a)ab+ac=520=>a(b+c)=520=>52a=520=>a=10
b)ab-ac=45=>a(b-c)=45=>9a=45=>a=5
c)ab+ac+70=170=>ab+ac=100=>a(b+c)=>25(b+c)=100=>b+c=4
d)ab-ac-48=2=>ab-ac=50=>a(b-c)=50=>10(b-c)=50=>b-c=5