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6+5•[60:6+6•(60+300:a-19•5)]=2006

Răspuns :

6+5x[10+6x(60+300:a-95)]=2006
5x[10+6x(60+300:a-95)]=2006-6=2000
10+6x(60+300:a-95)=2000:5=400
6x(60+300:a-95)=400-10=390
60+300:a-95=390:6=65
300:a-95=65-60=5
300:a=95+5=100
a=300:100=3