20-(3×5-2+3) ÷(26-9×2) =
20-(15-2+3) ÷(26-18) =
20-(13+3) ÷8=
20-16÷8=
20-2=
18
=20-(15-2+3)÷(26-9×2)
=20-(13+3)÷(26-9×2)
=20-16÷(26-18)
=20-16÷8
=20-2
=18
