Ответ:\(6 \cdot x = 42\)\(x = 42 : 6 = 7\)\(x : 7 = 4\)\(x = 4 \cdot 7 = 28\)\(112 : x = 7\)\(x = 112 : 7 = 16\)\(x \cdot 6 = 252\)\(x = 252 : 6 = 42\)Ответ: 7; 28; 16; 42.