One half of a number added to two thirds of the number is 21. find the number and show your work

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Graph y = -|x| + 2. click on the graph until the correct one appears.

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume