Answer:
30 minutes
Step-by-step explanation:
All you have to do is subtract 4:30 and 4:00 and get 30 minutes.
Just look at the minutes only. Since you need 4 o'clock to 4:30, its only 30 minutes.
Let's simplify by step
28x-12+2x-4-x
28x+-12+2x+-4+-x
Combine like terms
(28x+2x+-x)+(-12+-4)
29x+-16
= 29x-16
I hope that's help !
