Question

[(a+260:2) x 3+3] + 5 - 12=998
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Answer 1

[ ( 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

Answer 2

[(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