Răspuns :
[(a+270:3)x5+100]:600=1=>
[(a+90)x5+100]=600 =>
(a+90)x5=600-100 =>
(a+90)x5=500;
a+90=500:5;
a+90=100=>
a=100-90=> a=10
[(a+90)x5+100]=600 =>
(a+90)x5=600-100 =>
(a+90)x5=500;
a+90=500:5;
a+90=100=>
a=100-90=> a=10