Răspuns :
[tex] 3*10+5*x=8*20 [/tex]
[tex]30+5x=160 [/tex]
[tex]5x=160-30[/tex]
[tex]5x=130[/tex]
[tex]x=130:5[/tex]
[tex]x=26[/tex]
[tex]30+5x=160 [/tex]
[tex]5x=160-30[/tex]
[tex]5x=130[/tex]
[tex]x=130:5[/tex]
[tex]x=26[/tex]
V1(t final - t1) = V2 (x- t final) ( t1 < t final < x )
3(20-10) = 5(x-20)
30 = 5x - 100 5x = 130 x = 26 grade celsius
3(20-10) = 5(x-20)
30 = 5x - 100 5x = 130 x = 26 grade celsius