104-64:{13-12:[22-5*(38-4*x)]+4}=100
-64:{13-12:[22-5*(38-4x)]+4}=100-104
-64:{13-12:[22-5*(38-4x)]+4}=-4
64:{13-12:[22-5*(38-4x)]+4}=4
13-12:[22-5*(38-4x)]+4=16
-12:[22-5*(38-4x)]+4=3
-12:[22-5*(38-4x)]=3-4
-12:[22-5*(38-4x)]=-1
22-5*(38-4x)=12
-5*(38-4x)=12-22
-5*(38-4x)=-10
38-4x=2
4x=36
x=9
