Question

Dacă a+b=12 si b+c=15,calculati
b-a+c-b=​

Answer 1

a+b=12

b+c=15

b–a+c-b=?

——————

b–a+c–b=–a+c=c–a

c+b–(a+b)=15–12

c+b–a–b=3

c–a=3 <=> b–a+c–b=3