С1m1(t-t1)+c2m2(t-t1)=c3m3(t2-t)
400*0.2(t-12)+4200*0.15(t-12)=460*0.5(100-t)
710(t-12)=230(100-t)
710t-8520=23000-230t
940t=31520
t=33.5
ответ: 33,5 С
С1m1(t-t1)+c2m2(t-t1)=c3m3(t2-t)
400*0.2(t-12)+4200*0.15(t-12)=460*0.5(100-t)
710(t-12)=230(100-t)
710t-8520=23000-230t
940t=31520
t=33.5
ответ: 33,5 С