[tex]q1 + q2 = 0 \\ m \times c \times t - to + m \times c \times t - to = 0 \\ 300(t - 10) + 100(t - 100) = 0 \\ 300t - 3000 + 100t - 10000 = 0 \\ 400t - 13000 = 0 \\ 400t = 13000 \\ t = \frac{13000}{400} \\ {\boxed{\sf \ \red{t = 32,5°c}}}[/tex]
espero ter ajudado!
