Question

(a - 15) x 2 - [9x 2 - 24:4+ (100 - 9 x 5) x 0] = 12​

Answer 1

( a - 15 ) × 2 - [ 18 - 6 + ( 100 - 45 ) × 0 ] = 12

( a - 15 ) × 2 - [ 18 - 6 + 55 × 0 ] = 12

( a - 15 ) × 2 - 12 = 12

( a - 15 ) × 2 = 12 + 12

( a - 15 ) × 2 = 24

a - 15 = 24 : 2

a - 15 = 12

a = 12 + 15

a = 27