Question

3×{20-24÷[6+8×(3÷a+4)÷10-2]×6+9}÷11=3

Answer 1

3×{20-24÷[6+8×(3÷a+4)÷10-2]×6+9}÷11=3
3×{20-24÷[6+8×(3÷a+4)÷10-2]×6+9} = 3×11
3×{20-24÷[6+8×(3÷a+4)÷10-2]×6+9} = 33 20-24÷[6+8×(3÷a+4)÷10-2]×6+9 = 33:3
20-24÷[6+8×(3÷a+4)÷10-2]×6+9 = 11
20-24÷[6+8×(3÷a+4)÷10-2]×6 = 11-9
20-24÷[6+8×(3÷a+4)÷10-2]×6 = 2
24÷[6+8×(3÷a+4)÷10-2]×6 = 20-2
24÷[6+8×(3÷a+4)÷10-2]×6 = 18
24÷[6+8×(3÷a+4)÷10-2] = 18:6
24÷[6+8×(3÷a+4)÷10-2] = 3
6+8×(3÷a+4)÷10-2 = 24:3
6+8×(3÷a+4)÷10-2 = 8
8×(3÷a+4)÷10= 8-6+2
8×(3÷a+4)÷10 = 4
(3:a+4):10 = 4:8
(3:a+4):10 = 1/2
3:a+4 =1/2×10
3:a +4 = 10:2
3:a+4 = 5
3:a = 5-4
3:a = 1
a = 3×1
a = 3