639+х=248•4
639+х=992
х=992-639
х=353
42: m=70: 5
42: m=14
m= 3
48: e=57-49
48: e=8
e= 6
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2.42:3=70:5
3. 11-51:17=8
4.48:6=57-49
639+х=248•4
639+х=992
х=992-639
х=353
42: m=70: 5
42: m=14
m= 3
48: e=57-49
48: e=8
e= 6