Yes it does matter which way you subtract
Answer:
there will be 19 $100 bills
and 11 $10 bills
Step-by-step explanation:

The answer is <span>one halfn − 16
</span>
Let the number be n.
<span>One half of a number is (1/2n)
</span><span>decreased by 16 is (-16)
</span><span>one half of a number decreased by 16 is
1/2n - 16
Or </span><span>one halfn − 16</span>
Minus the 21 from the other side of the equation making it 7x=-21 then u divide the 7 from the x to the -21 resulting in x=-3
The area is 19.5 and the perimeter is 23.1