Answer:
x = 4 or x = -4 is your answer
9 is in parentheses therefore it's elevated above 3 that means you have to do operations on it first.
3 + (-9) = -6
The sum is negative.
10 , 20 , 30 , 40 , 50
8, 16 , 24, 32, 40
40 minutes
"Over" usually means divide. First hint, check.
If we write it out, it looks like this:

This is the same as <em>some number divided by 7.</em>