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maria330
@maria330
August 2022
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помогите 4, физика. спасибо;*
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AnnHoliday533
Q1+Q2=Q3сm1(t-t1)+сm2(t-t2)=cm3(t3-t)m1(t-t1)+m2(t-t2)=m3(t3-t)20(t-18)+6(t-42)=4(72-t)10t-180+3t-126=144-2t15t=450t=30Ответ: 30С
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