х+132:12=15, х+11=15, х=15-11, х=4
2х +11*12=207, х+132=207, х=207-132, х=75
23:х+7*9=72, 23:х+ 63=72, 23:х=72-63, 23:х=9, х=23/9, х= 1 целая 5/9
х:5+43*8=353, х:5+344=353, х:5= 353-344, х:5=9, х=9/5, х=1 целая 1/5
