Question

Fie A B C trei nr naturale
a)Daca x=35*A+63*B atunci aratatica x se divide cu 7
b)Daca y=48*A+64*B atunci aratati ca yse divide cu 8
c)Daca u=5*A+3*B+2*C si v=4*A+6*B+7*C atunci aratati ca u+v

Answer 1

a)x=35a+63b
x=7(5a+9b)=>7/x
b)y=48a+64b
  y=8(6a+8b)=>8/y
c)u=5a+3b+2c
  v=4a+6b+7c
 u+v=9a+9b+9c
 u+v=9(a+b+c)=>9/u+v