Question

Aflati numarul necunoscut
[(e:8+5609):2-111]:10=400

Answer 1

[(e:8+5609):2-111]=400 x 10
(e:8+5609):2=4000+111
e:8+5609=4111 x 2
e:8=8222 - 5609
e=2613 x 8
e=20904

verificare [(20904:8-5609):2-111]:10=[(2613+5609):2-111]:10=(8222:2-111):10=
               =(4111-111):10=4000:10=400