[ (3a+19 ) :5 -2) } :11 =35-2 (=33)
[( 3a+19) :5-2] =33*11 (=363)
(3a+19):5 =363+2 (=365)
3a+19 =365*5 (=1825)
3a =1825-19
3a =1806
a =1905:3 =602