Step-by-step explanation:
0.4t = 10.4 -19.6
0.4t= -9.2
t = -9.2/0.4
t = -23
Answer:
[tex] 0.4t+19.6=-10.4\\\\\\0.4t=-10.4-19.6\\\\\\0.4t=-30\\\\\\t=-\dfrac{30}{0.4}\\\\\\t=-75[/tex]
