Ответ:
2(15p+7)+7(12-4p)=416
120p+56+84-28p=416
92p+140=416
92p=276
p=3
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Ответ:
2(15p+7)+7(12-4p)=416
120p+56+84-28p=416
92p+140=416
92p=276
p=3