Răspuns:
1065:15+355:5+355:71+1065:a=162
71+71+5+1065:a=162
147+1065:a= 162
1065:a= 162-147
1065:a=15
15a=1065
a=1065:15
a=71
Verificare :
1065:15+355:5+355:71+1065:71=162
71+71+5+15=162
162=162
__________
[(b-8000):50+900]=4·250
(b-8000):50=1000-900
b-8000=100·50
b=5000+8000
b=13000
verificare:
[(13000-8000):50+900]:250=(5000:50+900):250=1000:250=4
