8x - 23 because you answer them until you have it all simplified
The perimeter of a rectangle is 2*L+2*W. Knowing that length is 99, we do 2*99 to get 198.Do 374-198, which is 176, we know that that is twice the length of the width. Therefore the width is 176/2, which is 88.
3+1=4
As all parents would teach their babies simple math...take three candies and take one more. How many candies do you have now? Four