Answer:
n=42
Step-by-step explanation:
The first step is to open the brackets by multiplying the vale before the brackets to the values inside the brackets giving attention to the signs which gives:
3n-15-2n-16=11
Then we collect like terms together.
3n-2n-15-16=11
evaluating the above equation we get
n-31=11
n=11+31
=42
the total weight of the screws and nails is 
pounds
Answer:
9a⁶b³c⁹
Step-by-step explanation:
Just divide the 27 by 3 since 27a⁶b³c⁹ is a single number
The first one & the second one
