Question

6)
Rezolvati problemele :

a) daca a + b = 15 si c = 3 , calculati ac +bc ;
b) daca a-b =27 si c=30 ,calculati ca-cb;
c) daca xy + xz =126 si x=5 , calculati x+z;
d) daca xy - xz =625 si x = 5 , calculati y-z;
e) daca mn+mp=450 si n+p =10 , calculati m ;
f) daca mn - pm =320 si n-p =16 , calculati m.

Answer 1

ac+bc=c(a+b)=3x15=45  restul se calculeaza la fel