What is the value of s?
units

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Heather, sarah, nicky, and jill each have nine markers. how many markers do they have in all?