Răspuns :
[(a + 27 : 3) x 5 + 10 ] : 60 = 1
( a + 9 ) x 5 + 10 = 60 x 1
( a + 9 ) x 5 + 10 = 60
( a + 9 ) x 5 = 60 - 10
( a + 9 ) x 5 = 50
a + 9 = 50 : 5
a + 9 = 10
a = 10 - 9
a = 1
( a + 9 ) x 5 + 10 = 60 x 1
( a + 9 ) x 5 + 10 = 60
( a + 9 ) x 5 = 60 - 10
( a + 9 ) x 5 = 50
a + 9 = 50 : 5
a + 9 = 10
a = 10 - 9
a = 1
[(a+27:3)×5+10]:60=1
[(a+9)×5+10]=1×60
(a+9)×5=60-10
a+9×5=50
a+9=50:5
a+9=10
a=10-9
a=1
[(a+9)×5+10]=1×60
(a+9)×5=60-10
a+9×5=50
a+9=50:5
a+9=10
a=10-9
a=1