Question

(525:5 +B):5+12=790

65x502:10-C-63):3=600

[(E :8+5 609):2-111]:10=400

343 452+214 126+N=989 789

Aflati nr necunoscut!

Answer 1

(525:5 +B):5+12=790
(525:5 +B):5=790-12
(525:5 +B):5=778
(525:5 +B)=778*5
(525:5 +B)=3890
B=3890-105
B=3785

(65 x 502 :10-C-63):3=600
65 x 502 :10-C-63=1800
65 x 502 :10-C=1800+63
65 x 502 :10-C=1863
32630:10-C=1863
3263-C=1863
-C=1863-3263
-C=-1400  |*(-1)
C=1400


[(E :8+5 609):2-111]:10=400
(E :8+5 609):2-111=400*10
(E :8+5 609):2-111=4000
(E :8+5 609):2=4000+111
(E :8+5 609):2=4111
(E :8+5 609)=4111*2
E :8+5 609=8222
E :8=8222-5609
E :8=2613
E=2613*8
E=20904

343452+214126+N=989 789

557 578+N=989 789

N=989789-557578
N=432 211