Ответ:\(x:18=28\); \(x=28\cdot18=504\).\(228:x=12\); \(x=228:12=19\).\((x-3):4=6\); \(x-3=24\); \(x=27\).\(x:4-8=6\); \(x:4=14\); \(x=56\).\(36:(x-2)=4\); \(x-2=9\); \(x=11\).\(36:x-2=4\); \(36:x=6\); \(x=6\).