Answer:
6 hours
Step-by-step explanation:
I attached the answer below.
I recommend using Desmos, that's what I used. It helps graph and plot points.
Hope this helps!!
a = 9
Let's make the demoninators of the 2 fractions the same :(2a+8)/10 - (5a +15)/10 = 5(2a + 8 - 5a + 15)/10 = 5=> -3a + 23 = 50=> -3a = 27=> a = 9