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[(a+270:3)×5+100]:600=1

Răspuns :

(a+90)x5+100=600
(a+90)x5=500
a+90=100, a=10
[( a + 270 : 3 ) x 5 + 100 ] : 600 = 1
[( a + 90 ) x 5 + 100 = 1 x 600 = 600
( a + 90 ) x 5 = 600 - 100 = 500
a + 90 = 500 : 5 = 100
a + 90 = 100
a = 100 - 90
a = 10