104-64:{13-12:[22-5x(38-4X)]+4}=100
64:{13-12:[22-5x(38-4X)]+4}=104-100
64:{13-12:[22-5x(38-4X)]+4}=4
{13-12:[22-5x(38-4X)+4}=64:4
13-12:[22-5x(38-4X)+4=16
13-12:[22-5x(38-4X)=16-4
13-12:[22-5x(38-4X)=12
12:[22-5x(38-4X)=13-12
12:[22-5x(38-4X)=1
22-5x(38-4X)=1x12
22-5x(38-4X)=12
5x(38-4X)=22-12
5x(38-4X)=10
38-4X=10:5
38-4X=2
4X=38-2
4X=36
X=36:4
X=9
