Answer: 7
hours
<u>Step-by-step explanation:</u>
Dad: 
Son: 
Together:
+
= 
(15x) +
(15x) =
(15x)
3x + 15 = 5x
<u> -3x </u> <u>-3x </u>
15 = 2x
<u> ÷2</u> <u>÷2 </u>
7.5 = x
Answer: you will get 8.75, but the answer should be 9 bags
Step-by-step explanation:
I think it may be this but you need to round=
7,577.521
Or this one
23,793.41594
I totally forgot how to do this one
1) 2x-1 or x=1/2
2) 5a-16 or a=16/5