c1m1(t-t1) =c2m2(t2-t)
4200*0,15(t-20)=460*0,1(65-t)
630(t-20)=46(65-t)
630t-12600=2990-46t
630t+46t=2990+12600
676t=15590
t=23
c1m1(t-t1) =c2m2(t2-t)
4200*0,15(t-20)=460*0,1(65-t)
630(t-20)=46(65-t)
630t-12600=2990-46t
630t+46t=2990+12600
676t=15590
t=23