Plz help find the value of X

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

The volume of a cube-shaped shipping container is 13,824 cubic inches. find the edge length of the shipping container.

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?