Question

ma gandescla un numar.daca adaug 12 apoi la rezultat adaug diferenta numerelor 17 si 9 obtin 25. la ce numar mam gandit?

Answer 1

(x+12)+(17-9) = 25

x+12+8 = 25

x+20 = 25

x = 5.

Answer 2

(a+12)+(17-9)=25
(a+12)+8=25
(a+12)=25-8
a+12=17
a=17-12
a=5
Răspuns: a=5