Question

Dau coroana!! Ex.6.

Answer 1

(7 la x) + (7 la x+2) = 2450
(7 la x) + (7  la x+2) = (7 la 4) + (7 la 2)
Apoi rezulta din injectivitate => x+x+2=4+2
=> 2x= 4+2-2
=> 2x= 4 =>x= 4/2 => x=2

Sper ca intelegi ceva :)))