Question

{12×[1+(18-16)]{÷{36-3×[5+(9-5)]}

Answer 1

{12x[1+(18-16)]}:{36-3x[5+(9-5)]}=
{12x[1+2]}:{36-3x[5+4]}=
{12x3}:{36-3x9}=
{36}:{36-27}=
36:9=
4