Question

27:[26+(6×a-7×3):9]+13-2×2×3)=2

Answer 1

27:(26+(6×a-21):9)+13-12)=2

26+(6×a-21):9+13-12=2×27

26+(6×a-21):9+13-12=54

(6×a-21):9+13-12=54-26

(6×a-21):9+13-12=28

(6×a-21):9+13=28+12

(6×a-21):9+13=40

(6×a-21):9=40-13

(6×a-21):9=27

6×a-21=27×9

6×a-21=243

6×a=243+21

6×a=264

a=264:6

a=44