Răspuns :
[ ( a + 260 : 2 ) × 3 + 3 ] + 5 - 12 = 998
[ ( a + 130 ) × 3 + 3 ] + 5 - 12 = 998
[ ( a + 130 ) × 3 + 3 ] + 5 = 998 + 12
[ ( a + 130 ) × 3 + 3 ] + 5 = 1010
( a + 130 ) × 3 + 3 = 1010 - 5
( a + 130 ) × 3 + 3 = 1005
( a + 130 ) × 3 = 1005 - 3
( a + 130 ) × 3 = 1002
a + 130 = 1002 : 3
a + 130 = 334
a = 334 - 130
a = 204
[ ( a + 130 ) × 3 + 3 ] + 5 - 12 = 998
[ ( a + 130 ) × 3 + 3 ] + 5 = 998 + 12
[ ( a + 130 ) × 3 + 3 ] + 5 = 1010
( a + 130 ) × 3 + 3 = 1010 - 5
( a + 130 ) × 3 + 3 = 1005
( a + 130 ) × 3 = 1005 - 3
( a + 130 ) × 3 = 1002
a + 130 = 1002 : 3
a + 130 = 334
a = 334 - 130
a = 204
[(a+260:2)×3+3]+5-12=998
[(a+130)×3+3]+5=998+12
[(a+130)×3+3]+5=1010
(a+130)×3+3=1010-5
(a+130)×3+3=1005-3
(a+130)×3=1002
(a+130)=1002:3
a+130=334
a=334-130
a=204
[(a+130)×3+3]+5=998+12
[(a+130)×3+3]+5=1010
(a+130)×3+3=1010-5
(a+130)×3+3=1005-3
(a+130)×3=1002
(a+130)=1002:3
a+130=334
a=334-130
a=204