х * 64 + 2176 =6272
х*64=6272-2176
х*64=4096
х=4096/64
х=64
12307 -х / 124 =11932
х/124=12307-11932
х/124=375
х=375*124
х=46500
5 * (28+х)=200
140+5х=200
5х=200-140
5х=60
х=60/5
х=12
100 / х + 15=35
100/х=35-15
100/х=20
х=100/20
х=5
