ответ
например:A) 8 (12m+27) + 5 (31-17m) = 96m+216+155-85m=11m+371
b) 11m+371=448
11m=448-371
11m=77
m=7
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ответ
например:A) 8 (12m+27) + 5 (31-17m) = 96m+216+155-85m=11m+371
b) 11m+371=448
11m=448-371
11m=77
m=7