1)/х+132: 12=15. 2)2*х+11*12=207. 3) 23: х+7*9=72 4) х: 5+43*8=353

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